121015887 has 24 divisors (see below), whose sum is σ = 169332912. Its totient is φ = 76809600.

The previous prime is 121015861. The next prime is 121015891. The reversal of 121015887 is 788510121.

It is not a de Polignac number, because 121015887 - 2¹⁴ = 120999503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121015087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 952818 + ... + 952944.

It is an arithmetic number, because the mean of its divisors is an integer number (7055538).

Almost surely, 2^121015887 is an apocalyptic number.

121015887 is a deficient number, since it is larger than the sum of its proper divisors (48317025).

121015887 is an equidigital number, since it uses as much as digits as its factorization.

121015887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 33.

The square root of 121015887 is about 11000.7221126615. The cubic root of 121015887 is about 494.6303903448.

The spelling of 121015887 in words is "one hundred twenty-one million, fifteen thousand, eight hundred eighty-seven".