102000122020 has 24 divisors (see below), whose sum is σ = 215135638200. Its totient is φ = 40621880832.

The previous prime is 102000121879. The next prime is 102000122057. The reversal of 102000122020 is 20221000201.

It can be written as a sum of positive squares in 4 ways, for example, as 46198343844 + 55801778176 = 214938^2 + 236224^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 102000121988 and 102000122006.

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, 11130805 + ... + 11139964.

It is an arithmetic number, because the mean of its divisors is an integer number (8963984925).

Almost surely, 2^102000122020 is an apocalyptic number.

102000122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102000122020 is an abundant number, since it is smaller than the sum of its proper divisors (113135516180).

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

102000122020 is a wasteful number, since it uses less digits than its factorization.

102000122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22271007 (or 22271005 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 102000122020 its reverse (20221000201), we get a palindrome (122221122221).

The spelling of 102000122020 in words is "one hundred two billion, one hundred twenty-two thousand, twenty".