202120100002 has 4 divisors (see below), whose sum is σ = 303180150006. Its totient is φ = 101060050000.

The previous prime is 202120099991. The next prime is 202120100023. The reversal of 202120100002 is 200001021202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 201287719801 + 832380201 = 448651^2 + 28851^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50530024999 + ... + 50530025002.

Almost surely, 2^202120100002 is an apocalyptic number.

202120100002 is a deficient number, since it is larger than the sum of its proper divisors (101060050004).

202120100002 is a wasteful number, since it uses less digits than its factorization.

202120100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101060050003.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 202120100002 its reverse (200001021202), we get a palindrome (402121121204).

The spelling of 202120100002 in words is "two hundred two billion, one hundred twenty million, one hundred thousand, two".