21202000202 has 4 divisors (see below), whose sum is σ = 31803000306. Its totient is φ = 10601000100.

The previous prime is 21202000201. The next prime is 21202000213. The reversal of 21202000202 is 20200020212.

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., 21201980881 + 19321 = 145609^2 + 139^2 .

It is not an unprimeable number, because it can be changed into a prime (21202000201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300500049 + ... + 5300500052.

Almost surely, 2^21202000202 is an apocalyptic number.

21202000202 is a deficient number, since it is larger than the sum of its proper divisors (10601000104).

21202000202 is a wasteful number, since it uses less digits than its factorization.

21202000202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601000103.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 21202000202 its reverse (20200020212), we get a palindrome (41402020414).

The spelling of 21202000202 in words is "twenty-one billion, two hundred two million, two hundred two", and thus it is an aban number.