21002211000202 has 4 divisors (see below), whose sum is σ = 31503316500306. Its totient is φ = 10501105500100.

The previous prime is 21002211000181. The next prime is 21002211000229. The reversal of 21002211000202 is 20200011220012.

It is a happy number.

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., 20999682016681 + 2528983521 = 4582541^2 + 50289^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250552750049 + ... + 5250552750052.

Almost surely, 2^{21002211000202} is an apocalyptic number.

21002211000202 is a deficient number, since it is larger than the sum of its proper divisors (10501105500104).

21002211000202 is a wasteful number, since it uses less digits than its factorization.

21002211000202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501105500103.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21002211000202 its reverse (20200011220012), we get a palindrome (41202222220214).

The spelling of 21002211000202 in words is "twenty-one trillion, two billion, two hundred eleven million, two hundred two", and thus it is an aban number.