21022200120202 has 4 divisors (see below), whose sum is σ = 31533300180306. Its totient is φ = 10511100060100.

The previous prime is 21022200120127. The next prime is 21022200120203. The reversal of 21022200120202 is 20202100222012.

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., 20207551268961 + 814648851241 = 4495281^2 + 902579^2 .

It is not an unprimeable number, because it can be changed into a prime (21022200120203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255550030049 + ... + 5255550030052.

Almost surely, 2^{21022200120202} is an apocalyptic number.

21022200120202 is a deficient number, since it is larger than the sum of its proper divisors (10511100060104).

21022200120202 is a wasteful number, since it uses less digits than its factorization.

21022200120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511100060103.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21022200120202 its reverse (20202100222012), we get a palindrome (41224300342214).

The spelling of 21022200120202 in words is "twenty-one trillion, twenty-two billion, two hundred million, one hundred twenty thousand, two hundred two".