31211132103 has 24 divisors (see below), whose sum is σ = 46575774336. Its totient is φ = 20119449600.

The previous prime is 31211132087. The next prime is 31211132111. The reversal of 31211132103 is 30123111213.

It is not a de Polignac number, because 31211132103 - 2⁴ = 31211132087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211132123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293583 + ... + 385503.

It is an arithmetic number, because the mean of its divisors is an integer number (1940657264).

Almost surely, 2^31211132103 is an apocalyptic number.

31211132103 is a deficient number, since it is larger than the sum of its proper divisors (15364642233).

31211132103 is a wasteful number, since it uses less digits than its factorization.

31211132103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93175 (or 93172 counting only the distinct ones).

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

Adding to 31211132103 its reverse (30123111213), we get a palindrome (61334243316).

The spelling of 31211132103 in words is "thirty-one billion, two hundred eleven million, one hundred thirty-two thousand, one hundred three".