121560621 has 24 divisors (see below), whose sum is σ = 203049504. Its totient is φ = 64118880.

The previous prime is 121560601. The next prime is 121560653. The reversal of 121560621 is 126065121.

It is not a de Polignac number, because 121560621 - 2⁷ = 121560493 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121560591 and 121560600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121560601) 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, 29895 + ... + 33716.

It is an arithmetic number, because the mean of its divisors is an integer number (8460396).

Almost surely, 2^121560621 is an apocalyptic number.

It is an amenable number.

121560621 is a deficient number, since it is larger than the sum of its proper divisors (81488883).

121560621 is a wasteful number, since it uses less digits than its factorization.

121560621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63641 (or 63634 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 121560621 is about 11025.4533240135. The cubic root of 121560621 is about 495.3714465321.

The spelling of 121560621 in words is "one hundred twenty-one million, five hundred sixty thousand, six hundred twenty-one".