202121000212100 has 18 divisors (see below), whose sum is σ = 438602570460474. Its totient is φ = 80848400084800.

The previous prime is 202121000212073. The next prime is 202121000212127. The reversal of 202121000212100 is 1212000121202.

It is an interprime number because it is at equal distance from previous prime (202121000212073) and next prime (202121000212127).

It can be written as a sum of positive squares in 3 ways, for example, as 10995020383876 + 191125979828224 = 3315874^2 + 13824832^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1010605000961 + ... + 1010605001160.

Almost surely, 2^{202121000212100} is an apocalyptic number.

202121000212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121000212100 is an abundant number, since it is smaller than the sum of its proper divisors (236481570248374).

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

202121000212100 is a wasteful number, since it uses less digits than its factorization.

202121000212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021210002135 (or 2021210002128 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202121000212100 its reverse (1212000121202), we get a palindrome (203333000333302).

The spelling of 202121000212100 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred twelve thousand, one hundred".