12311212302031 has 32 divisors (see below), whose sum is σ = 13517512243200. Its totient is φ = 11160432514560.

The previous prime is 12311212302023. The next prime is 12311212302071. The reversal of 12311212302031 is 13020321211321.

It is a cyclic number.

It is not a de Polignac number, because 12311212302031 - 2³ = 12311212302023 is a prime.

It is a super-2 number, since 2×12311212302031² (a number of 27 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 = 12311212301993 and 12311212302011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311212302071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 659366826 + ... + 659385496.

It is an arithmetic number, because the mean of its divisors is an integer number (422422257600).

Almost surely, 2^{12311212302031} is an apocalyptic number.

12311212302031 is a deficient number, since it is larger than the sum of its proper divisors (1206299941169).

12311212302031 is a wasteful number, since it uses less digits than its factorization.

12311212302031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21879.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 12311212302031 its reverse (13020321211321), we get a palindrome (25331533513352).

The spelling of 12311212302031 in words is "twelve trillion, three hundred eleven billion, two hundred twelve million, three hundred two thousand, thirty-one".