31103102121 has 32 divisors (see below), whose sum is σ = 51086703360. Its totient is φ = 16391337984.

The previous prime is 31103102111. The next prime is 31103102141. The reversal of 31103102121 is 12120130113.

It is a happy number.

It is not a de Polignac number, because 31103102121 - 2⁶ = 31103102057 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31103102121.

It is not an unprimeable number, because it can be changed into a prime (31103102111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257761 + ... + 358673.

It is an arithmetic number, because the mean of its divisors is an integer number (1596459480).

Almost surely, 2^31103102121 is an apocalyptic number.

It is an amenable number.

31103102121 is a deficient number, since it is larger than the sum of its proper divisors (19983601239).

31103102121 is a wasteful number, since it uses less digits than its factorization.

31103102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102065.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31103102121 its reverse (12120130113), we get a palindrome (43223232234).

The spelling of 31103102121 in words is "thirty-one billion, one hundred three million, one hundred two thousand, one hundred twenty-one".