202120000002 has 20 divisors (see below), whose sum is σ = 452898518886. Its totient is φ = 67373333280.

The previous prime is 202119999989. The next prime is 202120000013. The reversal of 202120000002 is 200000021202.

It can be written as a sum of positive squares in only one way, i.e., 197341181361 + 4778818641 = 444231^2 + 69129^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 623826999 + ... + 623827322.

Almost surely, 2^202120000002 is an apocalyptic number.

202120000002 is an abundant number, since it is smaller than the sum of its proper divisors (250778518884).

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

202120000002 is a wasteful number, since it uses less digits than its factorization.

202120000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247654335 (or 1247654326 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 202120000002 its reverse (200000021202), we get a palindrome (402120021204).

The spelling of 202120000002 in words is "two hundred two billion, one hundred twenty million, two", and thus it is an aban number.