22221340232121 has 12 divisors (see below), whose sum is σ = 33985579178772. Its totient is φ = 13942801714176.

The previous prime is 22221340232107. The next prime is 22221340232159. The reversal of 22221340232121 is 12123204312222.

22221340232121 is a `hidden beast` number, since 2 + 2 + 2 + 213 + 402 + 3 + 21 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13316397898896 + 8904942333225 = 3649164^2 + 2984115^2 .

It is not a de Polignac number, because 22221340232121 - 2²⁷ = 22221206014393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22221340252121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72618758776 + ... + 72618759081.

It is an arithmetic number, because the mean of its divisors is an integer number (2832131598231).

Almost surely, 2^{22221340232121} is an apocalyptic number.

It is an amenable number.

22221340232121 is a deficient number, since it is larger than the sum of its proper divisors (11764238946651).

22221340232121 is a wasteful number, since it uses less digits than its factorization.

22221340232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145237517880 (or 145237517877 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 22221340232121 its reverse (12123204312222), we get a palindrome (34344544544343).

The spelling of 22221340232121 in words is "twenty-two trillion, two hundred twenty-one billion, three hundred forty million, two hundred thirty-two thousand, one hundred twenty-one".