22121121100202 has 4 divisors (see below), whose sum is σ = 33181681650306. Its totient is φ = 11060560550100.

The previous prime is 22121121100201. The next prime is 22121121100231. The reversal of 22121121100202 is 20200112112122.

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., 20647109000281 + 1474012099921 = 4543909^2 + 1214089^2 .

It is not an unprimeable number, because it can be changed into a prime (22121121100201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5530280275049 + ... + 5530280275052.

Almost surely, 2^{22121121100202} is an apocalyptic number.

22121121100202 is a deficient number, since it is larger than the sum of its proper divisors (11060560550104).

22121121100202 is a wasteful number, since it uses less digits than its factorization.

22121121100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060560550103.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22121121100202 its reverse (20200112112122), we get a palindrome (42321233212324).

The spelling of 22121121100202 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred two".