121421416 has 16 divisors (see below), whose sum is σ = 237564000. Its totient is φ = 58071024.

The previous prime is 121421413. The next prime is 121421423. The reversal of 121421416 is 614124121.

It is not an unprimeable number, because it can be changed into a prime (121421413) 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, 329766 + ... + 330133.

It is an arithmetic number, because the mean of its divisors is an integer number (14847750).

Almost surely, 2^121421416 is an apocalyptic number.

It is an amenable number.

121421416 is a deficient number, since it is larger than the sum of its proper divisors (116142584).

121421416 is a wasteful number, since it uses less digits than its factorization.

121421416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659928 (or 659924 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 121421416 is about 11019.1386233226. The cubic root of 121421416 is about 495.1822829667.

Adding to 121421416 its reverse (614124121), we get a palindrome (735545537).

The spelling of 121421416 in words is "one hundred twenty-one million, four hundred twenty-one thousand, four hundred sixteen".