222221040122221 has 48 divisors (see below), whose sum is σ = 273771698840064. Its totient is φ = 176590356864768.

The previous prime is 222221040122173. The next prime is 222221040122267. The reversal of 222221040122221 is 122221040122222.

It is not a de Polignac number, because 222221040122221 - 2⁷ = 222221040122093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221040122621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1070361201 + ... + 1070568793.

It is an arithmetic number, because the mean of its divisors is an integer number (5703577059168).

Almost surely, 2^{222221040122221} is an apocalyptic number.

It is an amenable number.

222221040122221 is a deficient number, since it is larger than the sum of its proper divisors (51550658717843).

222221040122221 is a wasteful number, since it uses less digits than its factorization.

222221040122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216698 (or 216679 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 222221040122221 its reverse (122221040122222), we get a palindrome (344442080244443).

Subtracting from 222221040122221 its reverse (122221040122222), we obtain a palindrome (99999999999999).

The spelling of 222221040122221 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, forty million, one hundred twenty-two thousand, two hundred twenty-one".