122222222222 has 16 divisors (see below), whose sum is σ = 193847861760. Its totient is φ = 57635115192.

The previous prime is 122222222197. The next prime is 122222222237. The reversal of 122222222222 is 222222222221.

It is a nude number because it is divisible by every one of its digits.

122222222222 is a modest number, since divided by 222222 gives 122222 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7203128 + ... + 7220075.

It is an arithmetic number, because the mean of its divisors is an integer number (12115491360).

Almost surely, 2^122222222222 is an apocalyptic number.

122222222222 is a deficient number, since it is larger than the sum of its proper divisors (71625639538).

122222222222 is a wasteful number, since it uses less digits than its factorization.

122222222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14423447.

The product of its digits is 2048, while the sum is 23.

Adding to 122222222222 its reverse (222222222221), we get a palindrome (344444444443).

Subtracting 122222222222 from its reverse (222222222221), we obtain a palindrome (99999999999).

The spelling of 122222222222 in words is "one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".