21201000199 has 4 divisors (see below), whose sum is σ = 21327952464. Its totient is φ = 21074047936.

The previous prime is 21201000181. The next prime is 21201000211. The reversal of 21201000199 is 99100010212.

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 21201000199 - 2²⁹ = 20664129287 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 (21201900199) 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, 63475882 + ... + 63476215.

It is an arithmetic number, because the mean of its divisors is an integer number (5331988116).

Almost surely, 2^21201000199 is an apocalyptic number.

21201000199 is a deficient number, since it is larger than the sum of its proper divisors (126952265).

21201000199 is a wasteful number, since it uses less digits than its factorization.

21201000199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126952264.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 21201000199 in words is "twenty-one billion, two hundred one million, one hundred ninety-nine", and thus it is an aban number.