102020231 has 4 divisors (see below), whose sum is σ = 105538200. Its totient is φ = 98502264.

The previous prime is 102020227. The next prime is 102020239. The reversal of 102020231 is 132020201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 102020231 - 2² = 102020227 is a prime.

It is a super-2 number, since 2×102020231² = 20816255066586722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020239) 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, 1758941 + ... + 1758998.

It is an arithmetic number, because the mean of its divisors is an integer number (26384550).

Almost surely, 2^102020231 is an apocalyptic number.

102020231 is a deficient number, since it is larger than the sum of its proper divisors (3517969).

102020231 is an equidigital number, since it uses as much as digits as its factorization.

102020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517968.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 102020231 is about 10100.5064724498. The cubic root of 102020231 is about 467.2637616047.

Adding to 102020231 its reverse (132020201), we get a palindrome (234040432).

The spelling of 102020231 in words is "one hundred two million, twenty thousand, two hundred thirty-one".