121101201987 has 16 divisors (see below), whose sum is σ = 169979237760. Its totient is φ = 76479282432.

The previous prime is 121101201961. The next prime is 121101202003. The reversal of 121101201987 is 789102101121.

It is not a de Polignac number, because 121101201987 - 2¹⁰ = 121101200963 is a prime.

It is a super-2 number, since 2×121101201987² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121101203987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774483 + ... + 917619.

It is an arithmetic number, because the mean of its divisors is an integer number (10623702360).

Almost surely, 2^121101201987 is an apocalyptic number.

121101201987 is a deficient number, since it is larger than the sum of its proper divisors (48878035773).

121101201987 is a wasteful number, since it uses less digits than its factorization.

121101201987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158002.

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

The spelling of 121101201987 in words is "one hundred twenty-one billion, one hundred one million, two hundred one thousand, nine hundred eighty-seven".