21121330199 has 8 divisors (see below), whose sum is σ = 21854169360. Its totient is φ = 20388792256.

The previous prime is 21121330193. The next prime is 21121330211. The reversal of 21121330199 is 99103312112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21121330199 - 2¹⁶ = 21121264663 is a prime.

It is a super-2 number, since 2×21121330199² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121330193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72299 + ... + 217875.

It is an arithmetic number, because the mean of its divisors is an integer number (2731771170).

Almost surely, 2^21121330199 is an apocalyptic number.

21121330199 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21121330199 is a deficient number, since it is larger than the sum of its proper divisors (732839161).

21121330199 is a wasteful number, since it uses less digits than its factorization.

21121330199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150609.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 21121330199 in words is "twenty-one billion, one hundred twenty-one million, three hundred thirty thousand, one hundred ninety-nine".