102421322020 has 24 divisors (see below), whose sum is σ = 215287539768. Its totient is φ = 40929907200.

The previous prime is 102421321993. The next prime is 102421322063. The reversal of 102421322020 is 20223124201.

It can be written as a sum of positive squares in 4 ways, for example, as 49174836516 + 53246485504 = 221754^2 + 230752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2392101 + ... + 2434540.

It is an arithmetic number, because the mean of its divisors is an integer number (8970314157).

Almost surely, 2^102421322020 is an apocalyptic number.

102421322020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102421322020 is an abundant number, since it is smaller than the sum of its proper divisors (112866217748).

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

102421322020 is a wasteful number, since it uses less digits than its factorization.

102421322020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4827711 (or 4827709 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 102421322020 its reverse (20223124201), we get a palindrome (122644446221).

The spelling of 102421322020 in words is "one hundred two billion, four hundred twenty-one million, three hundred twenty-two thousand, twenty".