31123023320999 has 4 divisors (see below), whose sum is σ = 31128382896864. Its totient is φ = 31117663745136.

The previous prime is 31123023320969. The next prime is 31123023321029. The reversal of 31123023320999 is 99902332032113.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (31123023320969) and next prime (31123023321029).

It is a cyclic number.

It is not a de Polignac number, because 31123023320999 - 2⁸ = 31123023320743 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 (31123023320969) 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, 2679779222 + ... + 2679790835.

It is an arithmetic number, because the mean of its divisors is an integer number (7782095724216).

Almost surely, 2^{31123023320999} is an apocalyptic number.

31123023320999 is a deficient number, since it is larger than the sum of its proper divisors (5359575865).

31123023320999 is an equidigital number, since it uses as much as digits as its factorization.

31123023320999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5359575864.

The product of its (nonzero) digits is 472392, while the sum is 47.

The spelling of 31123023320999 in words is "thirty-one trillion, one hundred twenty-three billion, twenty-three million, three hundred twenty thousand, nine hundred ninety-nine".