311132121031 has 4 divisors (see below), whose sum is σ = 312995187792. Its totient is φ = 309269054272.

The previous prime is 311132120987. The next prime is 311132121103. The reversal of 311132121031 is 130121231113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130121231113 = 23 ⋅5657444831.

It is a cyclic number.

It is not a de Polignac number, because 311132121031 - 2¹⁵ = 311132088263 is a prime.

It is a super-2 number, since 2×311132121031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311132121631) 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, 931533130 + ... + 931533463.

It is an arithmetic number, because the mean of its divisors is an integer number (78248796948).

Almost surely, 2^311132121031 is an apocalyptic number.

311132121031 is a deficient number, since it is larger than the sum of its proper divisors (1863066761).

311132121031 is a wasteful number, since it uses less digits than its factorization.

311132121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863066760.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 311132121031 its reverse (130121231113), we get a palindrome (441253352144).

The spelling of 311132121031 in words is "three hundred eleven billion, one hundred thirty-two million, one hundred twenty-one thousand, thirty-one".