311212322131 has 8 divisors (see below), whose sum is σ = 311436076160. Its totient is φ = 310988624832.

The previous prime is 311212322129. The next prime is 311212322149. The reversal of 311212322131 is 131223212113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311212322131 - 2¹ = 311212322129 is a prime.

It is a super-2 number, since 2×311212322131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311212322431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23023831 + ... + 23037343.

It is an arithmetic number, because the mean of its divisors is an integer number (38929509520).

Almost surely, 2^311212322131 is an apocalyptic number.

311212322131 is a deficient number, since it is larger than the sum of its proper divisors (223754029).

311212322131 is a wasteful number, since it uses less digits than its factorization.

311212322131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28365.

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

Adding to 311212322131 its reverse (131223212113), we get a palindrome (442435534244).

The spelling of 311212322131 in words is "three hundred eleven billion, two hundred twelve million, three hundred twenty-two thousand, one hundred thirty-one".