121660355 has 16 divisors (see below), whose sum is σ = 147853728. Its totient is φ = 96096000.

The previous prime is 121660351. The next prime is 121660367. The reversal of 121660355 is 553066121.

It is not a de Polignac number, because 121660355 - 2² = 121660351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121660351) 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, 183725 + ... + 184385.

It is an arithmetic number, because the mean of its divisors is an integer number (9240858).

Almost surely, 2^121660355 is an apocalyptic number.

121660355 is a deficient number, since it is larger than the sum of its proper divisors (26193373).

121660355 is a wasteful number, since it uses less digits than its factorization.

121660355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 121660355 is about 11029.9752946233. The cubic root of 121660355 is about 495.5068847743.

The spelling of 121660355 in words is "one hundred twenty-one million, six hundred sixty thousand, three hundred fifty-five".