12122021142 has 80 divisors (see below), whose sum is σ = 33864728832. Its totient is φ = 3148573680.

The previous prime is 12122021129. The next prime is 12122021159. The reversal of 12122021142 is 24112022121.

12122021142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 473418 + ... + 498365.

Almost surely, 2^12122021142 is an apocalyptic number.

12122021142 is an abundant number, since it is smaller than the sum of its proper divisors (21742707690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12122021142 is a wasteful number, since it uses less digits than its factorization.

12122021142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971815 (or 971806 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12122021142 its reverse (24112022121), we get a palindrome (36234043263).

The spelling of 12122021142 in words is "twelve billion, one hundred twenty-two million, twenty-one thousand, one hundred forty-two".