122222222221 has 8 divisors (see below), whose sum is σ = 133339752000. Its totient is φ = 111105762240.

The previous prime is 122222222197. The next prime is 122222222237.

122222222221 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 122222222221 - 2¹³ = 122222214029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122222222192 and 122222222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222222921) 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, 18481 + ... + 494758.

It is an arithmetic number, because the mean of its divisors is an integer number (16667469000).

Almost surely, 2^122222222221 is an apocalyptic number.

122222222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122222222221 is a deficient number, since it is larger than the sum of its proper divisors (11117529779).

122222222221 is a wasteful number, since it uses less digits than its factorization.

122222222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534899.

The product of its digits is 1024, while the sum is 22.

Multiplying 122222222221 by its sum of digits (22), we get a palindrome (2688888888862).

It can be divided in two parts, 122222 and 222221, that added together give a palindrome (344443).

The spelling of 122222222221 in words is "one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".