31312103211 has 12 divisors (see below), whose sum is σ = 45231541992. Its totient is φ = 20873374656.

The previous prime is 31312103201. The next prime is 31312103243. The reversal of 31312103211 is 11230121313.

31312103211 is a `hidden beast` number, since 3 + 131 + 210 + 321 + 1 = 666.

It is not a de Polignac number, because 31312103211 - 2⁷ = 31312103083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31312103201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43795 + ... + 254051.

It is an arithmetic number, because the mean of its divisors is an integer number (3769295166).

Almost surely, 2^31312103211 is an apocalyptic number.

31312103211 is a deficient number, since it is larger than the sum of its proper divisors (13919438781).

31312103211 is a wasteful number, since it uses less digits than its factorization.

31312103211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226810 (or 226807 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31312103211 its reverse (11230121313), we get a palindrome (42542224524).

The spelling of 31312103211 in words is "thirty-one billion, three hundred twelve million, one hundred three thousand, two hundred eleven".