12122133121 has 4 divisors (see below), whose sum is σ = 13853866432. Its totient is φ = 10390399812.

The previous prime is 12122133113. The next prime is 12122133131. The reversal of 12122133121 is 12133122121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12133122121 = 1321 ⋅9184801.

It is a cyclic number.

It is not a de Polignac number, because 12122133121 - 2³ = 12122133113 is a prime.

It is a super-2 number, since 2×12122133121² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12122133131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865866645 + ... + 865866658.

It is an arithmetic number, because the mean of its divisors is an integer number (3463466608).

Almost surely, 2^12122133121 is an apocalyptic number.

It is an amenable number.

12122133121 is a deficient number, since it is larger than the sum of its proper divisors (1731733311).

12122133121 is an equidigital number, since it uses as much as digits as its factorization.

12122133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731733310.

The product of its digits is 144, while the sum is 19.

Adding to 12122133121 its reverse (12133122121), we get a palindrome (24255255242).

The spelling of 12122133121 in words is "twelve billion, one hundred twenty-two million, one hundred thirty-three thousand, one hundred twenty-one".