12111869031 has 4 divisors (see below), whose sum is σ = 16149158712. Its totient is φ = 8074579352.

The previous prime is 12111869017. The next prime is 12111869047. The reversal of 12111869031 is 13096811121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13096811121 = 3 ⋅4365603707.

It is a cyclic number.

It is not a de Polignac number, because 12111869031 - 2⁷ = 12111868903 is a prime.

It is a super-2 number, since 2×12111869031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12111868983 and 12111869001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111869051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018644836 + ... + 2018644841.

It is an arithmetic number, because the mean of its divisors is an integer number (4037289678).

Almost surely, 2^12111869031 is an apocalyptic number.

12111869031 is a deficient number, since it is larger than the sum of its proper divisors (4037289681).

12111869031 is an equidigital number, since it uses as much as digits as its factorization.

12111869031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037289680.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 12111869031 in words is "twelve billion, one hundred eleven million, eight hundred sixty-nine thousand, thirty-one".