121112222122 has 16 divisors (see below), whose sum is σ = 181930474440. Its totient is φ = 60468771328.

The previous prime is 121112222107. The next prime is 121112222123. The reversal of 121112222122 is 221222211121.

It can be written as a sum of positive squares in 4 ways, for example, as 110344216761 + 10768005361 = 332181^2 + 103769^2 .

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 121112222122.

It is not an unprimeable number, because it can be changed into a prime (121112222123) 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, 8249004 + ... + 8263672.

Almost surely, 2^121112222122 is an apocalyptic number.

121112222122 is a deficient number, since it is larger than the sum of its proper divisors (60818252318).

121112222122 is a wasteful number, since it uses less digits than its factorization.

121112222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20345.

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

Adding to 121112222122 its reverse (221222211121), we get a palindrome (342334433243).

The spelling of 121112222122 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twenty-two".