121134232421 has 4 divisors (see below), whose sum is σ = 121380942144. Its totient is φ = 120887522700.

The previous prime is 121134232381. The next prime is 121134232441. The reversal of 121134232421 is 124232431121.

It is a happy number.

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 121134232421 - 2¹⁴ = 121134216037 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 (121134232441) 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, 123354125 + ... + 123355106.

It is an arithmetic number, because the mean of its divisors is an integer number (30345235536).

Almost surely, 2^121134232421 is an apocalyptic number.

It is an amenable number.

121134232421 is a deficient number, since it is larger than the sum of its proper divisors (246709723).

121134232421 is an equidigital number, since it uses as much as digits as its factorization.

121134232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246709722.

The product of its digits is 2304, while the sum is 26.

Adding to 121134232421 its reverse (124232431121), we get a palindrome (245366663542).

The spelling of 121134232421 in words is "one hundred twenty-one billion, one hundred thirty-four million, two hundred thirty-two thousand, four hundred twenty-one".