231421042020 has 96 divisors (see below), whose sum is σ = 740782844928. Its totient is φ = 52879416192.

The previous prime is 231421041997. The next prime is 231421042043. The reversal of 231421042020 is 20240124132.

It is an interprime number because it is at equal distance from previous prime (231421041997) and next prime (231421042043).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1259247 + ... + 1431273.

It is an arithmetic number, because the mean of its divisors is an integer number (7716487968).

Almost surely, 2^231421042020 is an apocalyptic number.

231421042020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231421042020 is an abundant number, since it is smaller than the sum of its proper divisors (509361802908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231421042020 is a wasteful number, since it uses less digits than its factorization.

231421042020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175249 (or 175247 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 231421042020 its reverse (20240124132), we get a palindrome (251661166152).

The spelling of 231421042020 in words is "two hundred thirty-one billion, four hundred twenty-one million, forty-two thousand, twenty".