121132421 has 8 divisors (see below), whose sum is σ = 126961344. Its totient is φ = 115350400.

The previous prime is 121132411. The next prime is 121132423. The reversal of 121132421 is 124231121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121132421 - 2¹⁰ = 121131397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121132421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121132423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6380 + ... + 16821.

It is an arithmetic number, because the mean of its divisors is an integer number (15870168).

Almost surely, 2^121132421 is an apocalyptic number.

It is an amenable number.

121132421 is a deficient number, since it is larger than the sum of its proper divisors (5828923).

121132421 is a wasteful number, since it uses less digits than its factorization.

121132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23451.

The product of its digits is 96, while the sum is 17.

The square root of 121132421 is about 11006.0174904459. The cubic root of 121132421 is about 494.7891099065.

Adding to 121132421 its reverse (124231121), we get a palindrome (245363542).

The spelling of 121132421 in words is "one hundred twenty-one million, one hundred thirty-two thousand, four hundred twenty-one".