21102201199 has 4 divisors (see below), whose sum is σ = 21103544200. Its totient is φ = 21100858200.

The previous prime is 21102201187. The next prime is 21102201217. The reversal of 21102201199 is 99110220112.

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 21102201199 - 2¹⁵ = 21102168431 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 (21102201179) 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, 647649 + ... + 679450.

It is an arithmetic number, because the mean of its divisors is an integer number (5275886050).

Almost surely, 2^21102201199 is an apocalyptic number.

21102201199 is a deficient number, since it is larger than the sum of its proper divisors (1343001).

21102201199 is a wasteful number, since it uses less digits than its factorization.

21102201199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343000.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 21102201199 in words is "twenty-one billion, one hundred two million, two hundred one thousand, one hundred ninety-nine".