1056520072011 has 4 divisors (see below), whose sum is σ = 1408693429352. Its totient is φ = 704346714672.

The previous prime is 1056520071977. The next prime is 1056520072087. The reversal of 1056520072011 is 1102700256501.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1056520072011 is a prime.

It is a super-2 number, since 2×1056520072011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1056520072011.

It is not an unprimeable number, because it can be changed into a prime (1056520072211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176086678666 + ... + 176086678671.

It is an arithmetic number, because the mean of its divisors is an integer number (352173357338).

Almost surely, 2^{1056520072011} is an apocalyptic number.

1056520072011 is a deficient number, since it is larger than the sum of its proper divisors (352173357341).

1056520072011 is an equidigital number, since it uses as much as digits as its factorization.

1056520072011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352173357340.

The product of its (nonzero) digits is 4200, while the sum is 30.

The spelling of 1056520072011 in words is "one trillion, fifty-six billion, five hundred twenty million, seventy-two thousand, eleven".