121087887 has 4 divisors (see below), whose sum is σ = 161450520. Its totient is φ = 80725256.

The previous prime is 121087853. The next prime is 121087903. The reversal of 121087887 is 788780121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788780121 = 3 ⋅262926707.

It is a cyclic number.

It is not a de Polignac number, because 121087887 - 2¹⁰ = 121086863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121086887) 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, 20181312 + ... + 20181317.

It is an arithmetic number, because the mean of its divisors is an integer number (40362630).

Almost surely, 2^121087887 is an apocalyptic number.

121087887 is a deficient number, since it is larger than the sum of its proper divisors (40362633).

121087887 is an equidigital number, since it uses as much as digits as its factorization.

121087887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40362632.

The product of its (nonzero) digits is 50176, while the sum is 42.

The square root of 121087887 is about 11003.9941384935. The cubic root of 121087887 is about 494.7284665243.

The spelling of 121087887 in words is "one hundred twenty-one million, eighty-seven thousand, eight hundred eighty-seven".