222131322440321 has 4 divisors (see below), whose sum is σ = 253864368503232. Its totient is φ = 190398276377412.

The previous prime is 222131322440309. The next prime is 222131322440329. The reversal of 222131322440321 is 123044223131222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222131322440321 - 2²⁶ = 222131255331457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222131322440329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15866523031445 + ... + 15866523031458.

It is an arithmetic number, because the mean of its divisors is an integer number (63466092125808).

Almost surely, 2^{222131322440321} is an apocalyptic number.

It is an amenable number.

222131322440321 is a deficient number, since it is larger than the sum of its proper divisors (31733046062911).

222131322440321 is an equidigital number, since it uses as much as digits as its factorization.

222131322440321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31733046062910.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 222131322440321 its reverse (123044223131222), we get a palindrome (345175545571543).

The spelling of 222131322440321 in words is "two hundred twenty-two trillion, one hundred thirty-one billion, three hundred twenty-two million, four hundred forty thousand, three hundred twenty-one".