202421420431999 has 12 divisors (see below), whose sum is σ = 205692488675856. Its totient is φ = 199186696406208.

The previous prime is 202421420431907. The next prime is 202421420432041. The reversal of 202421420431999 is 999134024124202.

It is not a de Polignac number, because 202421420431999 - 2³⁹ = 201871664618111 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 (202421420434999) 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, 44174059 + ... + 48540604.

It is an arithmetic number, because the mean of its divisors is an integer number (17141040722988).

Almost surely, 2^{202421420431999} is an apocalyptic number.

202421420431999 is a deficient number, since it is larger than the sum of its proper divisors (3271068243857).

202421420431999 is an equidigital number, since it uses as much as digits as its factorization.

202421420431999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92715054 (or 92714915 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 202421420431999 in words is "two hundred two trillion, four hundred twenty-one billion, four hundred twenty million, four hundred thirty-one thousand, nine hundred ninety-nine".