222231131221 has 4 divisors (see below), whose sum is σ = 242433961344. Its totient is φ = 202028301100.

The previous prime is 222231131203. The next prime is 222231131257. The reversal of 222231131221 is 122131132222.

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 222231131221 - 2¹³ = 222231123029 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222231131192 and 222231131201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222231171221) 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, 10101415045 + ... + 10101415066.

It is an arithmetic number, because the mean of its divisors is an integer number (60608490336).

Almost surely, 2^222231131221 is an apocalyptic number.

It is an amenable number.

222231131221 is a deficient number, since it is larger than the sum of its proper divisors (20202830123).

222231131221 is a wasteful number, since it uses less digits than its factorization.

222231131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20202830122.

The product of its digits is 576, while the sum is 22.

Adding to 222231131221 its reverse (122131132222), we get a palindrome (344362263443).

The spelling of 222231131221 in words is "two hundred twenty-two billion, two hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty-one".