21000112111099 has 4 divisors (see below), whose sum is σ = 22909213212120. Its totient is φ = 19091011010080.

The previous prime is 21000112111091. The next prime is 21000112111141. The reversal of 21000112111099 is 99011121100012.

It is a happy number.

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 21000112111099 - 2³ = 21000112111091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000112111091) 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, 954550550494 + ... + 954550550515.

It is an arithmetic number, because the mean of its divisors is an integer number (5727303303030).

Almost surely, 2^{21000112111099} is an apocalyptic number.

21000112111099 is a deficient number, since it is larger than the sum of its proper divisors (1909101101021).

21000112111099 is a wasteful number, since it uses less digits than its factorization.

21000112111099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909101101020.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 21000112111099 in words is "twenty-one trillion, one hundred twelve million, one hundred eleven thousand, ninety-nine".