1222001212056 has 16 divisors (see below), whose sum is σ = 3055003030200. Its totient is φ = 407333737344.

The previous prime is 1222001212021. The next prime is 1222001212057. The reversal of 1222001212056 is 6502121002221.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 50916717169 = 1222001212056 / (1 + 2 + 2 + 2 + 0 + 0 + 1 + 2 + 1 + 2 + 0 + 5 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222001212057) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 25458358561 + ... + 25458358608.

Almost surely, 2^{1222001212056} is an apocalyptic number.

It is an amenable number.

1222001212056 is an abundant number, since it is smaller than the sum of its proper divisors (1833001818144).

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

1222001212056 is a wasteful number, since it uses less digits than its factorization.

1222001212056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50916717178 (or 50916717174 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 1222001212056 its reverse (6502121002221), we get a palindrome (7724122214277).

The spelling of 1222001212056 in words is "one trillion, two hundred twenty-two billion, one million, two hundred twelve thousand, fifty-six".