22121013223641 has 4 divisors (see below), whose sum is σ = 29494684298192. Its totient is φ = 14747342149092.

The previous prime is 22121013223601. The next prime is 22121013223693. The reversal of 22121013223641 is 14632231012122.

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 not a de Polignac number, because 22121013223641 - 2¹⁰ = 22121013222617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121013223599 and 22121013223608.

It is not an unprimeable number, because it can be changed into a prime (22121013223601) 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, 3686835537271 + ... + 3686835537276.

It is an arithmetic number, because the mean of its divisors is an integer number (7373671074548).

Almost surely, 2^{22121013223641} is an apocalyptic number.

It is an amenable number.

22121013223641 is a deficient number, since it is larger than the sum of its proper divisors (7373671074551).

22121013223641 is an equidigital number, since it uses as much as digits as its factorization.

22121013223641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373671074550.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 22121013223641 its reverse (14632231012122), we get a palindrome (36753244235763).

The spelling of 22121013223641 in words is "twenty-two trillion, one hundred twenty-one billion, thirteen million, two hundred twenty-three thousand, six hundred forty-one".