211221000299 has 4 divisors (see below), whose sum is σ = 211983531264. Its totient is φ = 210458469336.

The previous prime is 211221000293. The next prime is 211221000311. The reversal of 211221000299 is 992000122112.

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 211221000299 - 2⁴ = 211221000283 is a prime.

It is a super-2 number, since 2×211221000299² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211221000293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381265067 + ... + 381265620.

It is an arithmetic number, because the mean of its divisors is an integer number (52995882816).

Almost surely, 2^211221000299 is an apocalyptic number.

211221000299 is a deficient number, since it is larger than the sum of its proper divisors (762530965).

211221000299 is an equidigital number, since it uses as much as digits as its factorization.

211221000299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762530964.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 211221000299 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred ninety-nine", and thus it is an aban number.