202121000010 has 48 divisors (see below), whose sum is σ = 539717706216. Its totient is φ = 52442204544.

The previous prime is 202120999991. The next prime is 202121000099. The reversal of 202121000010 is 10000121202.

It can be written as a sum of positive squares in 4 ways, for example, as 170629303329 + 31491696681 = 413073^2 + 177459^2 .

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 = 202120999956 and 202121000001.

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, 30345169 + ... + 30351828.

Almost surely, 2^202121000010 is an apocalyptic number.

202121000010 is an abundant number, since it is smaller than the sum of its proper divisors (337596706206).

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

202121000010 is a wasteful number, since it uses less digits than its factorization.

202121000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60697047 (or 60697044 counting only the distinct ones).

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

Adding to 202121000010 its reverse (10000121202), we get a palindrome (212121121212).

The spelling of 202121000010 in words is "two hundred two billion, one hundred twenty-one million, ten", and thus it is an aban number.