31312202121311 has 8 divisors (see below), whose sum is σ = 31346302583664. Its totient is φ = 31278113694720.

The previous prime is 31312202121307. The next prime is 31312202121323. The reversal of 31312202121311 is 11312120221313.

It is a happy number.

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 31312202121311 - 2² = 31312202121307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312202121511) 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, 2201996 + ... + 8214206.

It is an arithmetic number, because the mean of its divisors is an integer number (3918287822958).

Almost surely, 2^{31312202121311} is an apocalyptic number.

31312202121311 is a deficient number, since it is larger than the sum of its proper divisors (34100462353).

31312202121311 is a wasteful number, since it uses less digits than its factorization.

31312202121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6017881.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31312202121311 its reverse (11312120221313), we get a palindrome (42624322342624).

The spelling of 31312202121311 in words is "thirty-one trillion, three hundred twelve billion, two hundred two million, one hundred twenty-one thousand, three hundred eleven".