222221202022221 has 16 divisors (see below), whose sum is σ = 304626289890048. Its totient is φ = 143990301153600.

The previous prime is 222221202022217. The next prime is 222221202022229. The reversal of 222221202022221 is 122220202122222.

It is not a de Polignac number, because 222221202022221 - 2² = 222221202022217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222221202022191 and 222221202022200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221202022229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1063653685 + ... + 1063862586.

It is an arithmetic number, because the mean of its divisors is an integer number (19039143118128).

Almost surely, 2^{222221202022221} is an apocalyptic number.

It is an amenable number.

222221202022221 is a deficient number, since it is larger than the sum of its proper divisors (82405087867827).

222221202022221 is a wasteful number, since it uses less digits than its factorization.

222221202022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127517252.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 222221202022221 its reverse (122220202122222), we get a palindrome (344441404144443).

The spelling of 222221202022221 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred two million, twenty-two thousand, two hundred twenty-one".