123221222222 has 16 divisors (see below), whose sum is σ = 213105732192. Its totient is φ = 52341757440.

The previous prime is 123221222203. The next prime is 123221222239. The reversal of 123221222222 is 222222122321.

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, 38943179 + ... + 38946342.

It is an arithmetic number, because the mean of its divisors is an integer number (13319108262).

Almost surely, 2^123221222222 is an apocalyptic number.

123221222222 is a deficient number, since it is larger than the sum of its proper divisors (89884509970).

123221222222 is a wasteful number, since it uses less digits than its factorization.

123221222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77889643.

The product of its digits is 1536, while the sum is 23.

Adding to 123221222222 its reverse (222222122321), we get a palindrome (345443344543).

Subtracting 123221222222 from its reverse (222222122321), we obtain a palindrome (99000900099).

The spelling of 123221222222 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".