102020209942 has 32 divisors (see below), whose sum is σ = 177422876928. Its totient is φ = 43094327136.

The previous prime is 102020209931. The next prime is 102020209943. The reversal of 102020209942 is 249902020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020209943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122253 + ... + 467959.

It is an arithmetic number, because the mean of its divisors is an integer number (5544464904).

Almost surely, 2^102020209942 is an apocalyptic number.

102020209942 is a deficient number, since it is larger than the sum of its proper divisors (75402666986).

102020209942 is a wasteful number, since it uses less digits than its factorization.

102020209942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346020.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 102020209942 in words is "one hundred two billion, twenty million, two hundred nine thousand, nine hundred forty-two".