121111200987 has 24 divisors (see below), whose sum is σ = 187861727232. Its totient is φ = 69200586000.

The previous prime is 121111200967. The next prime is 121111201021. The reversal of 121111200987 is 789002111121.

It is a de Polignac number, because none of the positive numbers 2^k-121111200987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121111200967) 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, 2217862 + ... + 2271812.

It is an arithmetic number, because the mean of its divisors is an integer number (7827571968).

Almost surely, 2^121111200987 is an apocalyptic number.

121111200987 is a deficient number, since it is larger than the sum of its proper divisors (66750526245).

121111200987 is a wasteful number, since it uses less digits than its factorization.

121111200987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69239 (or 69232 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 33.

The spelling of 121111200987 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred thousand, nine hundred eighty-seven".