12123012031 has 12 divisors (see below), whose sum is σ = 13131043488. Its totient is φ = 11187269184.

The previous prime is 12123012029. The next prime is 12123012049. The reversal of 12123012031 is 13021032121.

It is not a de Polignac number, because 12123012031 - 2¹ = 12123012029 is a prime.

It is a super-2 number, since 2×12123012031² (a number of 21 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 = 12123011996 and 12123012014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123012131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 746211 + ... + 762283.

It is an arithmetic number, because the mean of its divisors is an integer number (1094253624).

Almost surely, 2^12123012031 is an apocalyptic number.

12123012031 is a deficient number, since it is larger than the sum of its proper divisors (1008031457).

12123012031 is a wasteful number, since it uses less digits than its factorization.

12123012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20562 (or 20549 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12123012031 its reverse (13021032121), we get a palindrome (25144044152).

The spelling of 12123012031 in words is "twelve billion, one hundred twenty-three million, twelve thousand, thirty-one".