121412421 has 24 divisors (see below), whose sum is σ = 192890880. Its totient is φ = 73122336.

The previous prime is 121412411. The next prime is 121412437. The reversal of 121412421 is 124214121.

It is not a de Polignac number, because 121412421 - 2¹³ = 121404229 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121412394 and 121412403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121412411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5541 + ... + 16538.

It is an arithmetic number, because the mean of its divisors is an integer number (8037120).

Almost surely, 2^121412421 is an apocalyptic number.

It is an amenable number.

121412421 is a deficient number, since it is larger than the sum of its proper divisors (71478459).

121412421 is a wasteful number, since it uses less digits than its factorization.

121412421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22145 (or 22142 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 121412421 is about 11018.7304622629. The cubic root of 121412421 is about 495.1700548256.

Adding to 121412421 its reverse (124214121), we get a palindrome (245626542).

The spelling of 121412421 in words is "one hundred twenty-one million, four hundred twelve thousand, four hundred twenty-one".