11101112021987 has 4 divisors (see below), whose sum is σ = 11955043716000. Its totient is φ = 10247180327976.

The previous prime is 11101112021969. The next prime is 11101112022031. The reversal of 11101112021987 is 78912021110111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11101112021987 - 2¹⁴ = 11101112005603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101112024987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426965846987 + ... + 426965847012.

It is an arithmetic number, because the mean of its divisors is an integer number (2988760929000).

Almost surely, 2^{11101112021987} is an apocalyptic number.

11101112021987 is a deficient number, since it is larger than the sum of its proper divisors (853931694013).

11101112021987 is an equidigital number, since it uses as much as digits as its factorization.

11101112021987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853931694012.

The product of its (nonzero) digits is 2016, while the sum is 35.

The spelling of 11101112021987 in words is "eleven trillion, one hundred one billion, one hundred twelve million, twenty-one thousand, nine hundred eighty-seven".