121166417 has 4 divisors (see below), whose sum is σ = 121192116. Its totient is φ = 121140720.

The previous prime is 121166413. The next prime is 121166443. The reversal of 121166417 is 714661121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 714661121 = 3373 ⋅211877.

It can be written as a sum of positive squares in 2 ways, for example, as 38738176 + 82428241 = 6224^2 + 9079^2 .

It is a cyclic number.

It is not a de Polignac number, because 121166417 - 2² = 121166413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121166417.

It is not an unprimeable number, because it can be changed into a prime (121166411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3518 + ... + 15959.

It is an arithmetic number, because the mean of its divisors is an integer number (30298029).

Almost surely, 2^121166417 is an apocalyptic number.

It is an amenable number.

121166417 is a deficient number, since it is larger than the sum of its proper divisors (25699).

121166417 is an equidigital number, since it uses as much as digits as its factorization.

121166417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25698.

The product of its digits is 2016, while the sum is 29.

The square root of 121166417 is about 11007.5618099559. The cubic root of 121166417 is about 494.8353933515.

The spelling of 121166417 in words is "one hundred twenty-one million, one hundred sixty-six thousand, four hundred seventeen".