31312203111 has 48 divisors (see below), whose sum is σ = 53247317760. Its totient is φ = 17358503040.

The previous prime is 31312203103. The next prime is 31312203119. The reversal of 31312203111 is 11130221313.

31312203111 is a `hidden beast` number, since 3 + 131 + 220 + 311 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (31312203103) and next prime (31312203119).

It is not a de Polignac number, because 31312203111 - 2³ = 31312203103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312203119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 428496 + ... + 496218.

It is an arithmetic number, because the mean of its divisors is an integer number (1109319120).

Almost surely, 2^31312203111 is an apocalyptic number.

31312203111 is a deficient number, since it is larger than the sum of its proper divisors (21935114649).

31312203111 is a wasteful number, since it uses less digits than its factorization.

31312203111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67956 (or 67953 counting only the distinct ones).

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

Adding to 31312203111 its reverse (11130221313), we get a palindrome (42442424424).

The spelling of 31312203111 in words is "thirty-one billion, three hundred twelve million, two hundred three thousand, one hundred eleven".