222321121421 has 4 divisors (see below), whose sum is σ = 254081281632. Its totient is φ = 190560961212.

The previous prime is 222321121313. The next prime is 222321121513. The reversal of 222321121421 is 124121123222.

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 222321121421 - 2³⁴ = 205141252237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222324121421) 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, 15880080095 + ... + 15880080108.

It is an arithmetic number, because the mean of its divisors is an integer number (63520320408).

Almost surely, 2^222321121421 is an apocalyptic number.

It is an amenable number.

222321121421 is a deficient number, since it is larger than the sum of its proper divisors (31760160211).

222321121421 is an equidigital number, since it uses as much as digits as its factorization.

222321121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31760160210.

The product of its digits is 768, while the sum is 23.

Adding to 222321121421 its reverse (124121123222), we get a palindrome (346442244643).

The spelling of 222321121421 in words is "two hundred twenty-two billion, three hundred twenty-one million, one hundred twenty-one thousand, four hundred twenty-one".