22001131232321 has 8 divisors (see below), whose sum is σ = 22077348712584. Its totient is φ = 21925019980800.

The previous prime is 22001131232291. The next prime is 22001131232341. The reversal of 22001131232321 is 12323213110022.

It can be written as a sum of positive squares in 4 ways, for example, as 20996052801025 + 1005078431296 = 4582145^2 + 1002536^2 .

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 22001131232321 - 2³⁴ = 21983951363137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001131232341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26142236 + ... + 26970701.

It is an arithmetic number, because the mean of its divisors is an integer number (2759668589073).

Almost surely, 2^{22001131232321} is an apocalyptic number.

It is an amenable number.

22001131232321 is a deficient number, since it is larger than the sum of its proper divisors (76217480263).

22001131232321 is a wasteful number, since it uses less digits than its factorization.

22001131232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53114371.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 22001131232321 its reverse (12323213110022), we get a palindrome (34324344342343).

The spelling of 22001131232321 in words is "twenty-two trillion, one billion, one hundred thirty-one million, two hundred thirty-two thousand, three hundred twenty-one".