21221122000202 has 4 divisors (see below), whose sum is σ = 31831683000306. Its totient is φ = 10610561000100.

The previous prime is 21221122000151. The next prime is 21221122000213. The reversal of 21221122000202 is 20200022112212.

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., 13553655777841 + 7667466222361 = 3681529^2 + 2769019^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305280500049 + ... + 5305280500052.

Almost surely, 2^{21221122000202} is an apocalyptic number.

21221122000202 is a deficient number, since it is larger than the sum of its proper divisors (10610561000104).

21221122000202 is a wasteful number, since it uses less digits than its factorization.

21221122000202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610561000103.

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

Adding to 21221122000202 its reverse (20200022112212), we get a palindrome (41421144112414).

The spelling of 21221122000202 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred two", and thus it is an aban number.