110987120861 has 2 divisors, whose sum is σ = 110987120862. Its totient is φ = 110987120860.

The previous prime is 110987120857. The next prime is 110987120869. The reversal of 110987120861 is 168021789011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80262289636 + 30724831225 = 283306^2 + 175285^2 .

It is a cyclic number.

It is not a de Polignac number, because 110987120861 - 2² = 110987120857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110987120869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55493560430 + 55493560431.

It is an arithmetic number, because the mean of its divisors is an integer number (55493560431).

Almost surely, 2^110987120861 is an apocalyptic number.

It is an amenable number.

110987120861 is a deficient number, since it is larger than the sum of its proper divisors (1).

110987120861 is an equidigital number, since it uses as much as digits as its factorization.

110987120861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 44.

The spelling of 110987120861 in words is "one hundred ten billion, nine hundred eighty-seven million, one hundred twenty thousand, eight hundred sixty-one".