12121200122 has 24 divisors (see below), whose sum is σ = 19024761756. Its totient is φ = 5791209984.

The previous prime is 12121200121. The next prime is 12121200131. The reversal of 12121200122 is 22100212121.

It can be written as a sum of positive squares in 6 ways, for example, as 2207214361 + 9913985761 = 46981^2 + 99569^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12121200097 and 12121200106.

It is not an unprimeable number, because it can be changed into a prime (12121200121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126008 + ... + 200300.

Almost surely, 2^12121200122 is an apocalyptic number.

12121200122 is a deficient number, since it is larger than the sum of its proper divisors (6903561634).

12121200122 is an equidigital number, since it uses as much as digits as its factorization.

12121200122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74450 (or 74421 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12121200122 its reverse (22100212121), we get a palindrome (34221412243).

The spelling of 12121200122 in words is "twelve billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-two".