31210112002103 has 4 divisors (see below), whose sum is σ = 31210410194808. Its totient is φ = 31209813809400.

The previous prime is 31210112002087. The next prime is 31210112002109. The reversal of 31210112002103 is 30120021101213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31210112002103 - 2⁴ = 31210112002087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31210112002109) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 148939301 + ... + 149148702.

It is an arithmetic number, because the mean of its divisors is an integer number (7802602548702).

Almost surely, 2^{31210112002103} is an apocalyptic number.

31210112002103 is a deficient number, since it is larger than the sum of its proper divisors (298192705).

31210112002103 is a wasteful number, since it uses less digits than its factorization.

31210112002103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298192704.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31210112002103 its reverse (30120021101213), we get a palindrome (61330133103316).

The spelling of 31210112002103 in words is "thirty-one trillion, two hundred ten billion, one hundred twelve million, two thousand, one hundred three".