12111122022121 has 4 divisors (see below), whose sum is σ = 12181128507972. Its totient is φ = 12041115536272.

The previous prime is 12111122022119. The next prime is 12111122022149. The reversal of 12111122022121 is 12122022111121.

It is a happy number.

12111122022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6731222691600 + 5379899330521 = 2594460^2 + 2319461^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111122022121 - 2¹ = 12111122022119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111122022161) 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, 35003242666 + ... + 35003243011.

It is an arithmetic number, because the mean of its divisors is an integer number (3045282126993).

Almost surely, 2^{12111122022121} is an apocalyptic number.

It is an amenable number.

12111122022121 is a deficient number, since it is larger than the sum of its proper divisors (70006485851).

12111122022121 is an equidigital number, since it uses as much as digits as its factorization.

12111122022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70006485850.

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

Adding to 12111122022121 its reverse (12122022111121), we get a palindrome (24233144133242).

The spelling of 12111122022121 in words is "twelve trillion, one hundred eleven billion, one hundred twenty-two million, twenty-two thousand, one hundred twenty-one".