31203119999 has 4 divisors (see below), whose sum is σ = 33038597664. Its totient is φ = 29367642336.

The previous prime is 31203119963. The next prime is 31203120001. The reversal of 31203119999 is 99991130213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31203119999 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 (31203119929) 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, 917738807 + ... + 917738840.

It is an arithmetic number, because the mean of its divisors is an integer number (8259649416).

Almost surely, 2^31203119999 is an apocalyptic number.

31203119999 is a deficient number, since it is larger than the sum of its proper divisors (1835477665).

31203119999 is a wasteful number, since it uses less digits than its factorization.

31203119999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835477664.

The product of its (nonzero) digits is 118098, while the sum is 47.

The spelling of 31203119999 in words is "thirty-one billion, two hundred three million, one hundred nineteen thousand, nine hundred ninety-nine".