12420121022 has 16 divisors (see below), whose sum is σ = 18909241344. Its totient is φ = 6117195000.

The previous prime is 12420120991. The next prime is 12420121027. The reversal of 12420121022 is 22012102421.

It is a super-2 number, since 2×12420121022² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420121027) 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, 125447 + ... + 201437.

It is an arithmetic number, because the mean of its divisors is an integer number (1181827584).

Almost surely, 2^12420121022 is an apocalyptic number.

12420121022 is a deficient number, since it is larger than the sum of its proper divisors (6489120322).

12420121022 is a wasteful number, since it uses less digits than its factorization.

12420121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77215.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12420121022 its reverse (22012102421), we get a palindrome (34432223443).

The spelling of 12420121022 in words is "twelve billion, four hundred twenty million, one hundred twenty-one thousand, twenty-two".