12122120112121 has 4 divisors (see below), whose sum is σ = 12649168812672. Its totient is φ = 11595071411572.

The previous prime is 12122120112101. The next prime is 12122120112187. The reversal of 12122120112121 is 12121102122121.

It is a happy number.

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 12122120112121 - 2³⁷ = 11984681158649 is a prime.

It is a super-2 number, since 2×12122120112121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122120112101) 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, 263524350241 + ... + 263524350286.

It is an arithmetic number, because the mean of its divisors is an integer number (3162292203168).

Almost surely, 2^{12122120112121} is an apocalyptic number.

It is an amenable number.

12122120112121 is a deficient number, since it is larger than the sum of its proper divisors (527048700551).

12122120112121 is an equidigital number, since it uses as much as digits as its factorization.

12122120112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527048700550.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12122120112121 its reverse (12121102122121), we get a palindrome (24243222234242).

The spelling of 12122120112121 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty million, one hundred twelve thousand, one hundred twenty-one".