21122442325121 has 4 divisors (see below), whose sum is σ = 21134874606000. Its totient is φ = 21110010044244.

The previous prime is 21122442325037. The next prime is 21122442325139. The reversal of 21122442325121 is 12152324422112.

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 21122442325121 - 2¹⁸ = 21122442062977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122442325921) 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, 6216137891 + ... + 6216141288.

It is an arithmetic number, because the mean of its divisors is an integer number (5283718651500).

Almost surely, 2^{21122442325121} is an apocalyptic number.

It is an amenable number.

21122442325121 is a deficient number, since it is larger than the sum of its proper divisors (12432280879).

21122442325121 is a wasteful number, since it uses less digits than its factorization.

21122442325121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12432280878.

The product of its digits is 15360, while the sum is 32.

Adding to 21122442325121 its reverse (12152324422112), we get a palindrome (33274766747233).

The spelling of 21122442325121 in words is "twenty-one trillion, one hundred twenty-two billion, four hundred forty-two million, three hundred twenty-five thousand, one hundred twenty-one".