1222211120220 has 36 divisors (see below), whose sum is σ = 3707373731880. Its totient is φ = 325922965344.

The previous prime is 1222211120201. The next prime is 1222211120233. The reversal of 1222211120220 is 220211122221.

It is a happy number.

1222211120220 is a `hidden beast` number, since 1 + 222 + 211 + 12 + 0 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1222211120193 and 1222211120202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3395030710 + ... + 3395031069.

Almost surely, 2^{1222211120220} is an apocalyptic number.

1222211120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222211120220 is an abundant number, since it is smaller than the sum of its proper divisors (2485162611660).

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

1222211120220 is a wasteful number, since it uses less digits than its factorization.

1222211120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6790061794 (or 6790061789 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222211120220 its reverse (220211122221), we get a palindrome (1442422242441).

It can be divided in two parts, 1222211 and 120220, that added together give a palindrome (1342431).

The spelling of 1222211120220 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred twenty thousand, two hundred twenty".