31123101102201 has 24 divisors (see below), whose sum is σ = 44980035195264. Its totient is φ = 20737454682240.

The previous prime is 31123101102151. The next prime is 31123101102209. The reversal of 31123101102201 is 10220110132113.

31123101102201 is a `hidden beast` number, since 31 + 12 + 310 + 110 + 2 + 201 = 666.

It is not a de Polignac number, because 31123101102201 - 2¹⁵ = 31123101069433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31123101102209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138720625 + ... + 138944801.

It is an arithmetic number, because the mean of its divisors is an integer number (1874168133136).

Almost surely, 2^{31123101102201} is an apocalyptic number.

It is an amenable number.

31123101102201 is a deficient number, since it is larger than the sum of its proper divisors (13856934093063).

31123101102201 is a wasteful number, since it uses less digits than its factorization.

31123101102201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232501 (or 232498 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 31123101102201 its reverse (10220110132113), we get a palindrome (41343211234314).

The spelling of 31123101102201 in words is "thirty-one trillion, one hundred twenty-three billion, one hundred one million, one hundred two thousand, two hundred one".