22331313131221 has 8 divisors (see below), whose sum is σ = 22687957898784. Its totient is φ = 21975354881040.

The previous prime is 22331313131213. The next prime is 22331313131233. The reversal of 22331313131221 is 12213131313322.

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 22331313131221 - 2³ = 22331313131213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22331313131221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22331313131021) 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, 171563770 + ... + 171693883.

It is an arithmetic number, because the mean of its divisors is an integer number (2835994737348).

Almost surely, 2^{22331313131221} is an apocalyptic number.

It is an amenable number.

22331313131221 is a deficient number, since it is larger than the sum of its proper divisors (356644767563).

22331313131221 is an equidigital number, since it uses as much as digits as its factorization.

22331313131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343258691.

The product of its digits is 3888, while the sum is 28.

Adding to 22331313131221 its reverse (12213131313322), we get a palindrome (34544444444543).

The spelling of 22331313131221 in words is "twenty-two trillion, three hundred thirty-one billion, three hundred thirteen million, one hundred thirty-one thousand, two hundred twenty-one".