22121121102001 has 4 divisors (see below), whose sum is σ = 22483762431604. Its totient is φ = 21758479772400.

The previous prime is 22121121101983. The next prime is 22121121102007. The reversal of 22121121102001 is 10020112112122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9829786292001 + 12291334810000 = 3135249^2 + 3505900^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121121102001 - 2²⁵ = 22121087547569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121121102007) 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, 181320664710 + ... + 181320664831.

It is an arithmetic number, because the mean of its divisors is an integer number (5620940607901).

Almost surely, 2^{22121121102001} is an apocalyptic number.

It is an amenable number.

22121121102001 is a deficient number, since it is larger than the sum of its proper divisors (362641329603).

22121121102001 is an equidigital number, since it uses as much as digits as its factorization.

22121121102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362641329602.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22121121102001 its reverse (10020112112122), we get a palindrome (32141233214123).

The spelling of 22121121102001 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, one".