121417621 has 16 divisors (see below), whose sum is σ = 144474624. Its totient is φ = 100894464.

The previous prime is 121417613. The next prime is 121417631. The reversal of 121417621 is 126714121.

It is a cyclic number.

It is not a de Polignac number, because 121417621 - 2³ = 121417613 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 (121417631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6861 + ... + 17026.

It is an arithmetic number, because the mean of its divisors is an integer number (9029664).

Almost surely, 2^121417621 is an apocalyptic number.

It is an amenable number.

121417621 is a deficient number, since it is larger than the sum of its proper divisors (23057003).

121417621 is a wasteful number, since it uses less digits than its factorization.

121417621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23940.

The product of its digits is 672, while the sum is 25.

The square root of 121417621 is about 11018.9664215842. The cubic root of 121417621 is about 495.1771239747.

The spelling of 121417621 in words is "one hundred twenty-one million, four hundred seventeen thousand, six hundred twenty-one".