11121666931 has 4 divisors (see below), whose sum is σ = 11380310392. Its totient is φ = 10863023472.

The previous prime is 11121666901. The next prime is 11121666979. The reversal of 11121666931 is 13966612111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13966612111 = 37 ⋅377476003.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11121666931 is a prime.

It is a super-2 number, since 2×11121666931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121666901) 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, 129321666 + ... + 129321751.

It is an arithmetic number, because the mean of its divisors is an integer number (2845077598).

Almost surely, 2^11121666931 is an apocalyptic number.

11121666931 is a deficient number, since it is larger than the sum of its proper divisors (258643461).

11121666931 is an equidigital number, since it uses as much as digits as its factorization.

11121666931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258643460.

The product of its digits is 11664, while the sum is 37.

The spelling of 11121666931 in words is "eleven billion, one hundred twenty-one million, six hundred sixty-six thousand, nine hundred thirty-one".