22101212120121 has 12 divisors (see below), whose sum is σ = 31931300172772. Its totient is φ = 14730759670176.

The previous prime is 22101212120107. The next prime is 22101212120123. The reversal of 22101212120121 is 12102121210122.

22101212120121 is a `hidden beast` number, since 2 + 210 + 1 + 212 + 120 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20666161460025 + 1435050660096 = 4546005^2 + 1197936^2 .

It is not a de Polignac number, because 22101212120121 - 2¹⁰ = 22101212119097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22101212120094 and 22101212120103.

It is not an unprimeable number, because it can be changed into a prime (22101212120123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281770546 + ... + 281848971.

Almost surely, 2^{22101212120121} is an apocalyptic number.

It is an amenable number.

22101212120121 is a deficient number, since it is larger than the sum of its proper divisors (9830088052651).

22101212120121 is a wasteful number, since it uses less digits than its factorization.

22101212120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563623880 (or 563623877 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22101212120121 its reverse (12102121210122), we get a palindrome (34203333330243).

Subtracting from 22101212120121 its reverse (12102121210122), we obtain a palindrome (9999090909999).

The spelling of 22101212120121 in words is "twenty-two trillion, one hundred one billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-one".