121412431 has 4 divisors (see below), whose sum is σ = 138757072. Its totient is φ = 104067792.

The previous prime is 121412411. The next prime is 121412437. The reversal of 121412431 is 134214121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134214121 = 571 ⋅235051.

It is a cyclic number.

It is not a de Polignac number, because 121412431 - 2⁷ = 121412303 is a prime.

It is a super-2 number, since 2×121412431² = 29481956802659522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121412399 and 121412408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121412437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8672310 + ... + 8672323.

It is an arithmetic number, because the mean of its divisors is an integer number (34689268).

Almost surely, 2^121412431 is an apocalyptic number.

121412431 is a deficient number, since it is larger than the sum of its proper divisors (17344641).

121412431 is an equidigital number, since it uses as much as digits as its factorization.

121412431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17344640.

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

The square root of 121412431 is about 11018.7309160357. The cubic root of 121412431 is about 495.1700684203.

Adding to 121412431 its reverse (134214121), we get a palindrome (255626552).

The spelling of 121412431 in words is "one hundred twenty-one million, four hundred twelve thousand, four hundred thirty-one".