121212119 has 4 divisors (see below), whose sum is σ = 138528144. Its totient is φ = 103896096.

The previous prime is 121212103. The next prime is 121212127. The reversal of 121212119 is 911212121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 911212121 = 17 ⋅53600713.

It is a cyclic number.

It is not a de Polignac number, because 121212119 - 2⁴ = 121212103 is a prime.

It is a super-2 number, since 2×121212119² = 29384755584940322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121212119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212719) 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, 8658002 + ... + 8658015.

It is an arithmetic number, because the mean of its divisors is an integer number (34632036).

Almost surely, 2^121212119 is an apocalyptic number.

121212119 is a deficient number, since it is larger than the sum of its proper divisors (17316025).

121212119 is an equidigital number, since it uses as much as digits as its factorization.

121212119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17316024.

The product of its digits is 72, while the sum is 20.

The square root of 121212119 is about 11009.6375508007. The cubic root of 121212119 is about 494.8976001493.

It can be divided in two parts, 1212 and 12119, that added together give a palindrome (13331).

The spelling of 121212119 in words is "one hundred twenty-one million, two hundred twelve thousand, one hundred nineteen".