122122222221 has 8 divisors (see below), whose sum is σ = 163405000480. Its totient is φ = 81127129392.

The previous prime is 122122222147. The next prime is 122122222247. The reversal of 122122222221 is 122222221221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122122222221 - 2¹¹ = 122122220173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122227221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71920366 + ... + 71922063.

It is an arithmetic number, because the mean of its divisors is an integer number (20425625060).

Almost surely, 2^122122222221 is an apocalyptic number.

It is an amenable number.

122122222221 is a deficient number, since it is larger than the sum of its proper divisors (41282778259).

122122222221 is a wasteful number, since it uses less digits than its factorization.

122122222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143842715.

The product of its digits is 512, while the sum is 21.

Adding to 122122222221 its reverse (122222221221), we get a palindrome (244344443442).

The spelling of 122122222221 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".