111137452781 has 16 divisors (see below), whose sum is σ = 112911874560. Its totient is φ = 109378783920.

The previous prime is 111137452759. The next prime is 111137452793. The reversal of 111137452781 is 187254731111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111137452781 is a prime.

It is a super-2 number, since 2×111137452781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111137452711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11921240 + ... + 11930558.

It is an arithmetic number, because the mean of its divisors is an integer number (7056992160).

Almost surely, 2^111137452781 is an apocalyptic number.

It is an amenable number.

111137452781 is a deficient number, since it is larger than the sum of its proper divisors (1774421779).

111137452781 is a wasteful number, since it uses less digits than its factorization.

111137452781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144.

The product of its digits is 47040, while the sum is 41.

The spelling of 111137452781 in words is "one hundred eleven billion, one hundred thirty-seven million, four hundred fifty-two thousand, seven hundred eighty-one".