111556456414421 has 4 divisors (see below), whose sum is σ = 111563733907500. Its totient is φ = 111549178921344.

The previous prime is 111556456414409. The next prime is 111556456414423. The reversal of 111556456414421 is 124414654655111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7885144802500 + 103671311611921 = 2808050^2 + 10181911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111556456414421 is a prime.

It is a super-2 number, since 2×111556456414421² (a number of 29 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 111556456414421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111556456414423) 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, 3638723546 + ... + 3638754203.

It is an arithmetic number, because the mean of its divisors is an integer number (27890933476875).

Almost surely, 2^{111556456414421} is an apocalyptic number.

It is an amenable number.

111556456414421 is a deficient number, since it is larger than the sum of its proper divisors (7277493079).

111556456414421 is an equidigital number, since it uses as much as digits as its factorization.

111556456414421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7277493078.

The product of its digits is 2304000, while the sum is 50.

The spelling of 111556456414421 in words is "one hundred eleven trillion, five hundred fifty-six billion, four hundred fifty-six million, four hundred fourteen thousand, four hundred twenty-one".