111012123031 has 4 divisors (see below), whose sum is σ = 112111253064. Its totient is φ = 109912993000.

The previous prime is 111012122993. The next prime is 111012123043. The reversal of 111012123031 is 130321210111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130321210111 = 101 ⋅1290309011.

It is a cyclic number.

It is not a de Polignac number, because 111012123031 - 2⁹ = 111012122519 is a prime.

It is a super-2 number, since 2×111012123031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111012122996 and 111012123014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012123091) 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, 549564865 + ... + 549565066.

It is an arithmetic number, because the mean of its divisors is an integer number (28027813266).

Almost surely, 2^111012123031 is an apocalyptic number.

111012123031 is a deficient number, since it is larger than the sum of its proper divisors (1099130033).

111012123031 is a wasteful number, since it uses less digits than its factorization.

111012123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099130032.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111012123031 its reverse (130321210111), we get a palindrome (241333333142).

The spelling of 111012123031 in words is "one hundred eleven billion, twelve million, one hundred twenty-three thousand, thirty-one".