121102431 has 4 divisors (see below), whose sum is σ = 161469912. Its totient is φ = 80734952.

The previous prime is 121102417. The next prime is 121102459. The reversal of 121102431 is 134201121.

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

It is a cyclic number.

It is not a de Polignac number, because 121102431 - 2⁶ = 121102367 is a prime.

It is a super-2 number, since 2×121102431² = 29331597588219522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121102431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102411) 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, 20183736 + ... + 20183741.

It is an arithmetic number, because the mean of its divisors is an integer number (40367478).

Almost surely, 2^121102431 is an apocalyptic number.

121102431 is a deficient number, since it is larger than the sum of its proper divisors (40367481).

121102431 is an equidigital number, since it uses as much as digits as its factorization.

121102431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40367480.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121102431 is about 11004.6549696026. The cubic root of 121102431 is about 494.7482731924.

Adding to 121102431 its reverse (134201121), we get a palindrome (255303552).

It can be divided in two parts, 12110 and 2431, that added together give a palindrome (14541).

The spelling of 121102431 in words is "one hundred twenty-one million, one hundred two thousand, four hundred thirty-one".