31213031202105 has 32 divisors (see below), whose sum is σ = 52151641032960. Its totient is φ = 15911115432960.

The previous prime is 31213031202061. The next prime is 31213031202149. The reversal of 31213031202105 is 50120213031213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31213031202061) and next prime (31213031202149).

It is not a de Polignac number, because 31213031202105 - 2⁷ = 31213031201977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33788220 + ... + 34699709.

It is an arithmetic number, because the mean of its divisors is an integer number (1629738782280).

Almost surely, 2^{31213031202105} is an apocalyptic number.

It is an amenable number.

31213031202105 is a deficient number, since it is larger than the sum of its proper divisors (20938609830855).

31213031202105 is a wasteful number, since it uses less digits than its factorization.

31213031202105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68489281.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 31213031202105 its reverse (50120213031213), we get a palindrome (81333244233318).

The spelling of 31213031202105 in words is "thirty-one trillion, two hundred thirteen billion, thirty-one million, two hundred two thousand, one hundred five".