102020031 has 12 divisors (see below), whose sum is σ = 149138808. Its totient is φ = 67193424.

The previous prime is 102020021. The next prime is 102020053. The reversal of 102020031 is 130020201.

It is a happy number.

It is not a de Polignac number, because 102020031 - 2²⁵ = 68465599 is a prime.

It is a super-2 number, since 2×102020031² = 20816173450481922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 102019995 and 102020022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67540 + ... + 69033.

It is an arithmetic number, because the mean of its divisors is an integer number (12428234).

Almost surely, 2^102020031 is an apocalyptic number.

102020031 is a deficient number, since it is larger than the sum of its proper divisors (47118777).

102020031 is a wasteful number, since it uses less digits than its factorization.

102020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136662 (or 136659 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 102020031 is about 10100.4965719513. The cubic root of 102020031 is about 467.2634562639.

Adding to 102020031 its reverse (130020201), we get a palindrome (232040232).

The spelling of 102020031 in words is "one hundred two million, twenty thousand, thirty-one".