222211011211220 has 12 divisors (see below), whose sum is σ = 466643123543604. Its totient is φ = 88884404484480.

The previous prime is 222211011211171. The next prime is 222211011211229. The reversal of 222211011211220 is 22112110112222.

It can be written as a sum of positive squares in 2 ways, for example, as 139899738838084 + 82311272373136 = 11827922^2 + 9072556^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 11110550560561 = 222211011211220 / (2 + 2 + 2 + 2 + 1 + 1 + 0 + 1 + 1 + 2 + 1 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 222211011211192 and 222211011211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211011211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555275280261 + ... + 5555275280300.

It is an arithmetic number, because the mean of its divisors is an integer number (38886926961967).

Almost surely, 2^{222211011211220} is an apocalyptic number.

222211011211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222211011211220 is an abundant number, since it is smaller than the sum of its proper divisors (244432112332384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222211011211220 is a wasteful number, since it uses less digits than its factorization.

222211011211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110550560570 (or 11110550560568 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222211011211220 its reverse (22112110112222), we get a palindrome (244323121323442).

The spelling of 222211011211220 in words is "two hundred twenty-two trillion, two hundred eleven billion, eleven million, two hundred eleven thousand, two hundred twenty".