21002211202022 has 4 divisors (see below), whose sum is σ = 31503316803036. Its totient is φ = 10501105601010.

The previous prime is 21002211202013. The next prime is 21002211202043. The reversal of 21002211202022 is 22020211220012.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250552800504 + ... + 5250552800507.

It is an arithmetic number, because the mean of its divisors is an integer number (7875829200759).

Almost surely, 2^{21002211202022} is an apocalyptic number.

21002211202022 is a deficient number, since it is larger than the sum of its proper divisors (10501105601014).

21002211202022 is a wasteful number, since it uses less digits than its factorization.

21002211202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501105601013.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21002211202022 its reverse (22020211220012), we get a palindrome (43022422422034).

The spelling of 21002211202022 in words is "twenty-one trillion, two billion, two hundred eleven million, two hundred two thousand, twenty-two".