31020123319999 has 16 divisors (see below), whose sum is σ = 35323403399424. Its totient is φ = 26964885182400.

The previous prime is 31020123319993. The next prime is 31020123320051. The reversal of 31020123319999 is 99991332102013.

It is a happy number.

It is not a de Polignac number, because 31020123319999 - 2⁹ = 31020123319487 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 (31020123319993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20012997 + ... + 21507214.

It is an arithmetic number, because the mean of its divisors is an integer number (2207712712464).

Almost surely, 2^{31020123319999} is an apocalyptic number.

31020123319999 is a deficient number, since it is larger than the sum of its proper divisors (4303280079425).

31020123319999 is a wasteful number, since it uses less digits than its factorization.

31020123319999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41523198.

The product of its (nonzero) digits is 708588, while the sum is 52.

The spelling of 31020123319999 in words is "thirty-one trillion, twenty billion, one hundred twenty-three million, three hundred nineteen thousand, nine hundred ninety-nine".