202110201020 has 72 divisors (see below), whose sum is σ = 531705331584. Its totient is φ = 63964543104.

The previous prime is 202110200947. The next prime is 202110201067. The reversal of 202110201020 is 20102011202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 202110200992 and 202110201010.

It is a congruent number.

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, 7919372 + ... + 7944851.

It is an arithmetic number, because the mean of its divisors is an integer number (7384796272).

Almost surely, 2^202110201020 is an apocalyptic number.

202110201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202110201020 is an abundant number, since it is smaller than the sum of its proper divisors (329595130564).

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

202110201020 is a wasteful number, since it uses less digits than its factorization.

202110201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15864259 (or 15864250 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 202110201020 its reverse (20102011202), we get a palindrome (222212212222).

The spelling of 202110201020 in words is "two hundred two billion, one hundred ten million, two hundred one thousand, twenty".