222002123221 has 12 divisors (see below), whose sum is σ = 232210794060. Its totient is φ = 212224738880.

The previous prime is 222002123159. The next prime is 222002123237. The reversal of 222002123221 is 122321200222.

It can be written as a sum of positive squares in 2 ways, for example, as 87962662225 + 134039460996 = 296585^2 + 366114^2 .

It is not a de Polignac number, because 222002123221 - 2³¹ = 219854639573 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 (222002123281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 781281 + ... + 1026841.

It is an arithmetic number, because the mean of its divisors is an integer number (19350899505).

Almost surely, 2^222002123221 is an apocalyptic number.

It is an amenable number.

222002123221 is a deficient number, since it is larger than the sum of its proper divisors (10208670839).

222002123221 is a wasteful number, since it uses less digits than its factorization.

222002123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247316 (or 247293 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 222002123221 its reverse (122321200222), we get a palindrome (344323323443).

The spelling of 222002123221 in words is "two hundred twenty-two billion, two million, one hundred twenty-three thousand, two hundred twenty-one".