110121199987 has 2 divisors, whose sum is σ = 110121199988. Its totient is φ = 110121199986.

The previous prime is 110121199949. The next prime is 110121200009. The reversal of 110121199987 is 789991121011.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 110121199987 - 2³¹ = 107973716339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 110121199987.

It is not a weakly prime, because it can be changed into another prime (110121199087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060599993 + 55060599994.

It is an arithmetic number, because the mean of its divisors is an integer number (55060599994).

Almost surely, 2^110121199987 is an apocalyptic number.

110121199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

110121199987 is an equidigital number, since it uses as much as digits as its factorization.

110121199987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 49.

The spelling of 110121199987 in words is "one hundred ten billion, one hundred twenty-one million, one hundred ninety-nine thousand, nine hundred eighty-seven".