311212032131 has 16 divisors (see below), whose sum is σ = 417851121408. Its totient is φ = 223848813600.

The previous prime is 311212032127. The next prime is 311212032133. The reversal of 311212032131 is 131230212113.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 311212032131 - 2² = 311212032127 is a prime.

It is a super-2 number, since 2×311212032131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (311212032133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155449565 + ... + 155451566.

It is an arithmetic number, because the mean of its divisors is an integer number (26115695088).

Almost surely, 2^311212032131 is an apocalyptic number.

311212032131 is a deficient number, since it is larger than the sum of its proper divisors (106639089277).

311212032131 is a wasteful number, since it uses less digits than its factorization.

311212032131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310901162.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311212032131 its reverse (131230212113), we get a palindrome (442442244244).

The spelling of 311212032131 in words is "three hundred eleven billion, two hundred twelve million, thirty-two thousand, one hundred thirty-one".