31212131103 has 6 divisors (see below), whose sum is σ = 45084189384. Its totient is φ = 20808087396.

The previous prime is 31212131099. The next prime is 31212131113. The reversal of 31212131103 is 30113121213.

It is not a de Polignac number, because 31212131103 - 2² = 31212131099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212131113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1734007275 + ... + 1734007292.

It is an arithmetic number, because the mean of its divisors is an integer number (7514031564).

Almost surely, 2^31212131103 is an apocalyptic number.

31212131103 is a deficient number, since it is larger than the sum of its proper divisors (13872058281).

31212131103 is a wasteful number, since it uses less digits than its factorization.

31212131103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468014573 (or 3468014570 counting only the distinct ones).

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

Adding to 31212131103 its reverse (30113121213), we get a palindrome (61325252316).

The spelling of 31212131103 in words is "thirty-one billion, two hundred twelve million, one hundred thirty-one thousand, one hundred three".