202102122020 has 24 divisors (see below), whose sum is σ = 424427587584. Its totient is φ = 80838347616.

The previous prime is 202102121939. The next prime is 202102122037. The reversal of 202102122020 is 20221201202.

It is a junction number, because it is equal to n+sod(n) for n = 202102121986 and 202102122004.

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, 594119 + ... + 870161.

It is an arithmetic number, because the mean of its divisors is an integer number (17684482816).

Almost surely, 2^202102122020 is an apocalyptic number.

202102122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202102122020 is an abundant number, since it is smaller than the sum of its proper divisors (222325465564).

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

202102122020 is a wasteful number, since it uses less digits than its factorization.

202102122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312659 (or 312657 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 202102122020 its reverse (20221201202), we get a palindrome (222323323222).

The spelling of 202102122020 in words is "two hundred two billion, one hundred two million, one hundred twenty-two thousand, twenty".