31311011202121 has 16 divisors (see below), whose sum is σ = 35829230376960. Its totient is φ = 26804115196560.

The previous prime is 31311011202083. The next prime is 31311011202131. The reversal of 31311011202121 is 12120211011313.

It is a cyclic number.

It is not a de Polignac number, because 31311011202121 - 2⁷ = 31311011201993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311011202131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19277550 + ... + 20838568.

It is an arithmetic number, because the mean of its divisors is an integer number (2239326898560).

Almost surely, 2^{31311011202121} is an apocalyptic number.

It is an amenable number.

31311011202121 is a deficient number, since it is larger than the sum of its proper divisors (4518219174839).

31311011202121 is a wasteful number, since it uses less digits than its factorization.

31311011202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564644.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31311011202121 its reverse (12120211011313), we get a palindrome (43431222213434).

The spelling of 31311011202121 in words is "thirty-one trillion, three hundred eleven billion, eleven million, two hundred two thousand, one hundred twenty-one".