12122340121 has 4 divisors (see below), whose sum is σ = 12194929152. Its totient is φ = 12049751092.

The previous prime is 12122340101. The next prime is 12122340133. The reversal of 12122340121 is 12104322121.

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.

It is a cyclic number.

It is not a de Polignac number, because 12122340121 - 2⁹ = 12122339609 is a prime.

It is a super-2 number, since 2×12122340121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122340101) 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, 36294265 + ... + 36294598.

It is an arithmetic number, because the mean of its divisors is an integer number (3048732288).

Almost surely, 2^12122340121 is an apocalyptic number.

It is an amenable number.

12122340121 is a deficient number, since it is larger than the sum of its proper divisors (72589031).

12122340121 is an equidigital number, since it uses as much as digits as its factorization.

12122340121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72589030.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12122340121 its reverse (12104322121), we get a palindrome (24226662242).

The spelling of 12122340121 in words is "twelve billion, one hundred twenty-two million, three hundred forty thousand, one hundred twenty-one".