31020140999 has 4 divisors (see below), whose sum is σ = 31155600360. Its totient is φ = 30884681640.

The previous prime is 31020140927. The next prime is 31020141001. The reversal of 31020140999 is 99904102013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99904102013 = 607 ⋅164586659.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31020140999 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 (31020140399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67729337 + ... + 67729794.

It is an arithmetic number, because the mean of its divisors is an integer number (7788900090).

Almost surely, 2^31020140999 is an apocalyptic number.

31020140999 is a deficient number, since it is larger than the sum of its proper divisors (135459361).

31020140999 is a wasteful number, since it uses less digits than its factorization.

31020140999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135459360.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 31020140999 in words is "thirty-one billion, twenty million, one hundred forty thousand, nine hundred ninety-nine".