121122211222 has 16 divisors (see below), whose sum is σ = 182224852992. Its totient is φ = 60380824680.

The previous prime is 121122211219. The next prime is 121122211247. The reversal of 121122211222 is 222112221121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121122211222.

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, 1005643 + ... + 1119625.

It is an arithmetic number, because the mean of its divisors is an integer number (11389053312).

Almost surely, 2^121122211222 is an apocalyptic number.

121122211222 is a deficient number, since it is larger than the sum of its proper divisors (61102641770).

121122211222 is a wasteful number, since it uses less digits than its factorization.

121122211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115563.

The product of its digits is 128, while the sum is 19.

Adding to 121122211222 its reverse (222112221121), we get a palindrome (343234432343).

The spelling of 121122211222 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty-two".