122112121 has 4 divisors (see below), whose sum is σ = 122147200. Its totient is φ = 122077044.

The previous prime is 122112113. The next prime is 122112167. The reversal of 122112121 is 121211221.

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 122112121 - 2³ = 122112113 is a prime.

It is a super-2 number, since 2×122112121² = 29822740190237282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122112421) 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, 11661 + ... + 19498.

It is an arithmetic number, because the mean of its divisors is an integer number (30536800).

Almost surely, 2^122112121 is an apocalyptic number.

It is an amenable number.

122112121 is a deficient number, since it is larger than the sum of its proper divisors (35079).

122112121 is an equidigital number, since it uses as much as digits as its factorization.

122112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35078.

The product of its digits is 16, while the sum is 13.

The square root of 122112121 is about 11050.4353307913. The cubic root of 122112121 is about 496.1194553270.

Adding to 122112121 its reverse (121211221), we get a palindrome (243323342).

It can be divided in two parts, 1221121 and 21, that multiplied together give a triangular number (25643541 = T₇₁₆₁).

The spelling of 122112121 in words is "one hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".