221102121222220 has 48 divisors (see below), whose sum is σ = 531000513465408. Its totient is φ = 75755666914560.

The previous prime is 221102121222179. The next prime is 221102121222233. The reversal of 221102121222220 is 22222121201122.

It is a super-2 number, since 2×221102121222220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221102121222191 and 221102121222200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528692811 + ... + 529110850.

It is an arithmetic number, because the mean of its divisors is an integer number (11062510697196).

Almost surely, 2^{221102121222220} is an apocalyptic number.

221102121222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102121222220 is an abundant number, since it is smaller than the sum of its proper divisors (309898392243188).

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

221102121222220 is a wasteful number, since it uses less digits than its factorization.

221102121222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057805170 (or 1057805168 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221102121222220 its reverse (22222121201122), we get a palindrome (243324242423342).

The spelling of 221102121222220 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".