111021200019999 has 16 divisors (see below), whose sum is σ = 167172177324640. Its totient is φ = 72800786897280.

The previous prime is 111021200019979. The next prime is 111021200020111. The reversal of 111021200019999 is 999910002120111.

It is not a de Polignac number, because 111021200019999 - 2³³ = 111012610085407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021200019959) 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, 33704066362 + ... + 33704069655.

It is an arithmetic number, because the mean of its divisors is an integer number (10448261082790).

Almost surely, 2^{111021200019999} is an apocalyptic number.

111021200019999 is a deficient number, since it is larger than the sum of its proper divisors (56150977304641).

111021200019999 is an equidigital number, since it uses as much as digits as its factorization.

111021200019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67408136087 (or 67408136081 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 45.

The spelling of 111021200019999 in words is "one hundred eleven trillion, twenty-one billion, two hundred million, nineteen thousand, nine hundred ninety-nine".