121181413 has 4 divisors (see below), whose sum is σ = 121277440. Its totient is φ = 121085388.

The previous prime is 121181407. The next prime is 121181429. The reversal of 121181413 is 314181121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 314181121 = 409 ⋅768169.

It is a cyclic number.

It is not a de Polignac number, because 121181413 - 2⁹ = 121180901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121181443) 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, 46095 + ... + 48652.

It is an arithmetic number, because the mean of its divisors is an integer number (30319360).

Almost surely, 2^121181413 is an apocalyptic number.

It is an amenable number.

121181413 is a deficient number, since it is larger than the sum of its proper divisors (96027).

121181413 is an equidigital number, since it uses as much as digits as its factorization.

121181413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96026.

The product of its digits is 192, while the sum is 22.

The square root of 121181413 is about 11008.2429569846. The cubic root of 121181413 is about 494.8558067236.

It can be divided in two parts, 12118 and 1413, that added together give a palindrome (13531).

The spelling of 121181413 in words is "one hundred twenty-one million, one hundred eighty-one thousand, four hundred thirteen".