21112010220199 has 4 divisors (see below), whose sum is σ = 21113723452536. Its totient is φ = 21110296987864.

The previous prime is 21112010220173. The next prime is 21112010220239. The reversal of 21112010220199 is 99102201021112.

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 21112010220199 - 2³¹ = 21109862736551 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112010220199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112010220149) 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, 856597684 + ... + 856622329.

It is an arithmetic number, because the mean of its divisors is an integer number (5278430863134).

Almost surely, 2^{21112010220199} is an apocalyptic number.

21112010220199 is a deficient number, since it is larger than the sum of its proper divisors (1713232337).

21112010220199 is a wasteful number, since it uses less digits than its factorization.

21112010220199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713232336.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 21112010220199 in words is "twenty-one trillion, one hundred twelve billion, ten million, two hundred twenty thousand, one hundred ninety-nine".