121618887 has 8 divisors (see below), whose sum is σ = 174632304. Its totient is φ = 74842368.

The previous prime is 121618823. The next prime is 121618907. The reversal of 121618887 is 788816121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121618887 - 2⁶ = 121618823 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121611887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559178 + ... + 1559255.

It is an arithmetic number, because the mean of its divisors is an integer number (21829038).

Almost surely, 2^121618887 is an apocalyptic number.

121618887 is a deficient number, since it is larger than the sum of its proper divisors (53013417).

121618887 is a wasteful number, since it uses less digits than its factorization.

121618887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118449.

The product of its digits is 43008, while the sum is 42.

The square root of 121618887 is about 11028.0953477924. The cubic root of 121618887 is about 495.4505804438.

The spelling of 121618887 in words is "one hundred twenty-one million, six hundred eighteen thousand, eight hundred eighty-seven".