12420122122 has 16 divisors (see below), whose sum is σ = 19681532640. Its totient is φ = 5861971728.

The previous prime is 12420122111. The next prime is 12420122147. The reversal of 12420122122 is 22122102421.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 12420122122.

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, 579448 + ... + 600499.

It is an arithmetic number, because the mean of its divisors is an integer number (1230095790).

Almost surely, 2^12420122122 is an apocalyptic number.

12420122122 is a deficient number, since it is larger than the sum of its proper divisors (7261410518).

12420122122 is a wasteful number, since it uses less digits than its factorization.

12420122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180245.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12420122122 its reverse (22122102421), we get a palindrome (34542224543).

The spelling of 12420122122 in words is "twelve billion, four hundred twenty million, one hundred twenty-two thousand, one hundred twenty-two".