121111110987 has 8 divisors (see below), whose sum is σ = 163049263104. Its totient is φ = 79956849768.

The previous prime is 121111110973. The next prime is 121111110997. The reversal of 121111110987 is 789011111121.

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

It is not a de Polignac number, because 121111110987 - 2²⁸ = 120842675531 is a prime.

It is a super-2 number, since 2×121111110987² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121111110947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195972363 + ... + 195972980.

It is an arithmetic number, because the mean of its divisors is an integer number (20381157888).

Almost surely, 2^121111110987 is an apocalyptic number.

121111110987 is a deficient number, since it is larger than the sum of its proper divisors (41938152117).

121111110987 is a wasteful number, since it uses less digits than its factorization.

121111110987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391945449.

The product of its (nonzero) digits is 1008, while the sum is 33.

The spelling of 121111110987 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, nine hundred eighty-seven".