202100011020 has 72 divisors (see below), whose sum is σ = 629605280304. Its totient is φ = 52436757888.

The previous prime is 202100010991. The next prime is 202100011063. The reversal of 202100011020 is 20110001202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 202100010993 and 202100011011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15166014 + ... + 15179333.

It is an arithmetic number, because the mean of its divisors is an integer number (8744517782).

Almost surely, 2^202100011020 is an apocalyptic number.

202100011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202100011020 is an abundant number, since it is smaller than the sum of its proper divisors (427505269284).

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

202100011020 is a wasteful number, since it uses less digits than its factorization.

202100011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30345399 (or 30345394 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 202100011020 its reverse (20110001202), we get a palindrome (222210012222).

The spelling of 202100011020 in words is "two hundred two billion, one hundred million, eleven thousand, twenty".