31020123023021 has 32 divisors (see below), whose sum is σ = 34823457532800. Its totient is φ = 27391373152000.

The previous prime is 31020123022969. The next prime is 31020123023041. The reversal of 31020123023021 is 12032032102013.

It is a de Polignac number, because none of the positive numbers 2^k-31020123023021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31020123022984 and 31020123023002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020123023041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 801554930 + ... + 801593628.

It is an arithmetic number, because the mean of its divisors is an integer number (1088233047900).

Almost surely, 2^{31020123023021} is an apocalyptic number.

It is an amenable number.

31020123023021 is a deficient number, since it is larger than the sum of its proper divisors (3803334509779).

31020123023021 is a wasteful number, since it uses less digits than its factorization.

31020123023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52477.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31020123023021 its reverse (12032032102013), we get a palindrome (43052155125034).

The spelling of 31020123023021 in words is "thirty-one trillion, twenty billion, one hundred twenty-three million, twenty-three thousand, twenty-one".