22131121111421 has 16 divisors (see below), whose sum is σ = 27285809071104. Its totient is φ = 17516815689984.

The previous prime is 22131121111331. The next prime is 22131121111447. The reversal of 22131121111421 is 12411112113122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22131121111421 - 2¹⁴ = 22131121095037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131121111481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1754482445 + ... + 1754495058.

It is an arithmetic number, because the mean of its divisors is an integer number (1705363066944).

Almost surely, 2^{22131121111421} is an apocalyptic number.

It is an amenable number.

22131121111421 is a deficient number, since it is larger than the sum of its proper divisors (5154687959683).

22131121111421 is a wasteful number, since it uses less digits than its factorization.

22131121111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508977580.

The product of its digits is 192, while the sum is 23.

Adding to 22131121111421 its reverse (12411112113122), we get a palindrome (34542233224543).

The spelling of 22131121111421 in words is "twenty-two trillion, one hundred thirty-one billion, one hundred twenty-one million, one hundred eleven thousand, four hundred twenty-one".