22121020202122 has 4 divisors (see below), whose sum is σ = 33181530303186. Its totient is φ = 11060510101060.

The previous prime is 22121020202111. The next prime is 22121020202201. The reversal of 22121020202122 is 22120202012122.

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., 20966407630281 + 1154612571841 = 4578909^2 + 1074529^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22121020202122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5530255050529 + ... + 5530255050532.

Almost surely, 2^{22121020202122} is an apocalyptic number.

22121020202122 is a deficient number, since it is larger than the sum of its proper divisors (11060510101064).

22121020202122 is a wasteful number, since it uses less digits than its factorization.

22121020202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060510101063.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22121020202122 its reverse (22120202012122), we get a palindrome (44241222214244).

The spelling of 22121020202122 in words is "twenty-two trillion, one hundred twenty-one billion, twenty million, two hundred two thousand, one hundred twenty-two".