21030221299 has 8 divisors (see below), whose sum is σ = 21481881408. Its totient is φ = 20578736640.

The previous prime is 21030221293. The next prime is 21030221309. The reversal of 21030221299 is 99212203012.

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 21030221299 - 2¹¹ = 21030219251 is a prime.

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 21030221299.

It is not an unprimeable number, because it can be changed into a prime (21030221293) 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, 214609 + ... + 296845.

It is an arithmetic number, because the mean of its divisors is an integer number (2685235176).

Almost surely, 2^21030221299 is an apocalyptic number.

21030221299 is a deficient number, since it is larger than the sum of its proper divisors (451660109).

21030221299 is an equidigital number, since it uses as much as digits as its factorization.

21030221299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87725.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21030221299 in words is "twenty-one billion, thirty million, two hundred twenty-one thousand, two hundred ninety-nine".