121112421 has 8 divisors (see below), whose sum is σ = 162010464. Its totient is φ = 80478000.

The previous prime is 121112399. The next prime is 121112449. The reversal of 121112421 is 124211121.

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

It is not a de Polignac number, because 121112421 - 2¹³ = 121104229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121112421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112461) 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, 64830 + ... + 66671.

It is an arithmetic number, because the mean of its divisors is an integer number (20251308).

Almost surely, 2^121112421 is an apocalyptic number.

It is an amenable number.

121112421 is a deficient number, since it is larger than the sum of its proper divisors (40898043).

121112421 is a wasteful number, since it uses less digits than its factorization.

121112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131811.

The product of its digits is 32, while the sum is 15.

The square root of 121112421 is about 11005.1088590709. The cubic root of 121112421 is about 494.7618771013.

Adding to 121112421 its reverse (124211121), we get a palindrome (245323542).

The spelling of 121112421 in words is "one hundred twenty-one million, one hundred twelve thousand, four hundred twenty-one".