121652661 has 16 divisors (see below), whose sum is σ = 175945280. Its totient is φ = 74321280.

The previous prime is 121652627. The next prime is 121652677. The reversal of 121652661 is 166256121.

It is not a de Polignac number, because 121652661 - 2⁹ = 121652149 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 (121652621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5800 + ... + 16641.

It is an arithmetic number, because the mean of its divisors is an integer number (10996580).

Almost surely, 2^121652661 is an apocalyptic number.

It is an amenable number.

121652661 is a deficient number, since it is larger than the sum of its proper divisors (54292619).

121652661 is a wasteful number, since it uses less digits than its factorization.

121652661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22596.

The product of its digits is 4320, while the sum is 30.

The square root of 121652661 is about 11029.6265122623. The cubic root of 121652661 is about 495.4964389986.

The spelling of 121652661 in words is "one hundred twenty-one million, six hundred fifty-two thousand, six hundred sixty-one".