202102011210100 has 18 divisors (see below), whose sum is σ = 438561364326134. Its totient is φ = 80840804484000.

The previous prime is 202102011210097. The next prime is 202102011210101. The reversal of 202102011210100 is 1012110201202.

It can be written as a sum of positive squares in 3 ways, for example, as 11083186456164 + 191018824753936 = 3329142^2 + 13820956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102011210101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1010510055951 + ... + 1010510056150.

Almost surely, 2^{202102011210100} is an apocalyptic number.

202102011210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202102011210100 is an abundant number, since it is smaller than the sum of its proper divisors (236459353116034).

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

202102011210100 is a wasteful number, since it uses less digits than its factorization.

202102011210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021020112115 (or 2021020112108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202102011210100 its reverse (1012110201202), we get a palindrome (203114121411302).

The spelling of 202102011210100 in words is "two hundred two trillion, one hundred two billion, eleven million, two hundred ten thousand, one hundred".