120111221987 has 8 divisors (see below), whose sum is σ = 120815485440. Its totient is φ = 119408997960.

The previous prime is 120111221969. The next prime is 120111221999. The reversal of 120111221987 is 789122111021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120111221987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120111221947) 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, 391643 + ... + 627380.

It is an arithmetic number, because the mean of its divisors is an integer number (15101935680).

Almost surely, 2^120111221987 is an apocalyptic number.

120111221987 is a deficient number, since it is larger than the sum of its proper divisors (704263453).

120111221987 is a wasteful number, since it uses less digits than its factorization.

120111221987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019713.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 120111221987 in words is "one hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred eighty-seven".