1055051221931 has 16 divisors (see below), whose sum is σ = 1225664052480. Its totient is φ = 889414210080.

The previous prime is 1055051221927. The next prime is 1055051221963. The reversal of 1055051221931 is 1391221505501.

It is a cyclic number.

It is not a de Polignac number, because 1055051221931 - 2² = 1055051221927 is a prime.

It is a super-2 number, since 2×1055051221931² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1055051221891 and 1055051221900.

It is not an unprimeable number, because it can be changed into a prime (1055051221031) 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 15 ways as a sum of consecutive naturals, for example, 4263680 + ... + 4504338.

It is an arithmetic number, because the mean of its divisors is an integer number (76604003280).

Almost surely, 2^{1055051221931} is an apocalyptic number.

1055051221931 is a deficient number, since it is larger than the sum of its proper divisors (170612830549).

1055051221931 is a wasteful number, since it uses less digits than its factorization.

1055051221931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250994.

The product of its (nonzero) digits is 13500, while the sum is 35.

The spelling of 1055051221931 in words is "one trillion, fifty-five billion, fifty-one million, two hundred twenty-one thousand, nine hundred thirty-one".