22012202020121 has 4 divisors (see below), whose sum is σ = 22029043798032. Its totient is φ = 21995360242212.

The previous prime is 22012202020093. The next prime is 22012202020129. The reversal of 22012202020121 is 12102020221022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22012202020121 - 2¹⁰ = 22012202019097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22012202020121.

It is not an unprimeable number, because it can be changed into a prime (22012202020129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8420886995 + ... + 8420889608.

It is an arithmetic number, because the mean of its divisors is an integer number (5507260949508).

Almost surely, 2^{22012202020121} is an apocalyptic number.

It is an amenable number.

22012202020121 is a deficient number, since it is larger than the sum of its proper divisors (16841777911).

22012202020121 is a wasteful number, since it uses less digits than its factorization.

22012202020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16841777910.

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

Adding to 22012202020121 its reverse (12102020221022), we get a palindrome (34114222241143).

The spelling of 22012202020121 in words is "twenty-two trillion, twelve billion, two hundred two million, twenty thousand, one hundred twenty-one".