121660624 has 10 divisors (see below), whose sum is σ = 235717490. Its totient is φ = 60830304.

The previous prime is 121660589. The next prime is 121660633. The reversal of 121660624 is 426066121.

It can be written as a sum of positive squares in only one way, i.e., 87086224 + 34574400 = 9332^2 + 5880^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121660592 and 121660601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3801879 + ... + 3801910.

It is an arithmetic number, because the mean of its divisors is an integer number (23571749).

Almost surely, 2^121660624 is an apocalyptic number.

It is an amenable number.

121660624 is a deficient number, since it is larger than the sum of its proper divisors (114056866).

121660624 is an equidigital number, since it uses as much as digits as its factorization.

121660624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603797 (or 7603791 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 121660624 is about 11029.9874886602. The cubic root of 121660624 is about 495.5072499748.

The spelling of 121660624 in words is "one hundred twenty-one million, six hundred sixty thousand, six hundred twenty-four".