22131110121221 has 8 divisors (see below), whose sum is σ = 22277908044000. Its totient is φ = 21984777486000.

The previous prime is 22131110121199. The next prime is 22131110121223. The reversal of 22131110121221 is 12212101113122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22131110121221 - 2⁶ = 22131110121157 is a prime.

It is a super-2 number, since 2×22131110121221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22131110121193 and 22131110121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131110121223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116226446 + ... + 116416703.

It is an arithmetic number, because the mean of its divisors is an integer number (2784738505500).

Almost surely, 2^{22131110121221} is an apocalyptic number.

It is an amenable number.

22131110121221 is a deficient number, since it is larger than the sum of its proper divisors (146797922779).

22131110121221 is a wasteful number, since it uses less digits than its factorization.

22131110121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232643779.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 22131110121221 its reverse (12212101113122), we get a palindrome (34343211234343).

The spelling of 22131110121221 in words is "twenty-two trillion, one hundred thirty-one billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".