222142112221 has 4 divisors (see below), whose sum is σ = 224638091100. Its totient is φ = 219646133344.

The previous prime is 222142112183. The next prime is 222142112251. The reversal of 222142112221 is 122211241222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30324391321 + 191817720900 = 174139^2 + 437970^2 .

It is a cyclic number.

It is not a de Polignac number, because 222142112221 - 2²³ = 222133723613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222142112192 and 222142112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222142112251) 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, 1247989306 + ... + 1247989483.

It is an arithmetic number, because the mean of its divisors is an integer number (56159522775).

Almost surely, 2^222142112221 is an apocalyptic number.

It is an amenable number.

222142112221 is a deficient number, since it is larger than the sum of its proper divisors (2495978879).

222142112221 is an equidigital number, since it uses as much as digits as its factorization.

222142112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495978878.

The product of its digits is 512, while the sum is 22.

Adding to 222142112221 its reverse (122211241222), we get a palindrome (344353353443).

The spelling of 222142112221 in words is "two hundred twenty-two billion, one hundred forty-two million, one hundred twelve thousand, two hundred twenty-one".