31313033210121 has 64 divisors (see below), whose sum is σ = 47191403212800. Its totient is φ = 18324175415040.

The previous prime is 31313033210111. The next prime is 31313033210183. The reversal of 31313033210121 is 12101233031313.

It is not a de Polignac number, because 31313033210121 - 2⁶ = 31313033210057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31313033210091 and 31313033210100.

It is not an unprimeable number, because it can be changed into a prime (31313033210111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 220737306 + ... + 220879116.

It is an arithmetic number, because the mean of its divisors is an integer number (737365675200).

Almost surely, 2^{31313033210121} is an apocalyptic number.

It is an amenable number.

31313033210121 is a deficient number, since it is larger than the sum of its proper divisors (15878370002679).

31313033210121 is a wasteful number, since it uses less digits than its factorization.

31313033210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143286.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31313033210121 its reverse (12101233031313), we get a palindrome (43414266241434).

The spelling of 31313033210121 in words is "thirty-one trillion, three hundred thirteen billion, thirty-three million, two hundred ten thousand, one hundred twenty-one".