102202020020 has 12 divisors (see below), whose sum is σ = 214624242084. Its totient is φ = 40880808000.

The previous prime is 102202019989. The next prime is 102202020029. The reversal of 102202020020 is 20020202201.

It can be written as a sum of positive squares in 2 ways, for example, as 55668627364 + 46533392656 = 235942^2 + 215716^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102202019983 and 102202020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102202020029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2555050481 + ... + 2555050520.

It is an arithmetic number, because the mean of its divisors is an integer number (17885353507).

Almost surely, 2^102202020020 is an apocalyptic number.

102202020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102202020020 is an abundant number, since it is smaller than the sum of its proper divisors (112422222064).

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

102202020020 is a wasteful number, since it uses less digits than its factorization.

102202020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110101010 (or 5110101008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 102202020020 its reverse (20020202201), we get a palindrome (122222222221).

The spelling of 102202020020 in words is "one hundred two billion, two hundred two million, twenty thousand, twenty".