10221199999 has 4 divisors (see below), whose sum is σ = 10550916160. Its totient is φ = 9891483840.

The previous prime is 10221199979. The next prime is 10221200009. The reversal of 10221199999 is 99999112201.

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 10221199999 - 2²⁷ = 10086982271 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 (10221199909) 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, 164858034 + ... + 164858095.

It is an arithmetic number, because the mean of its divisors is an integer number (2637729040).

Almost surely, 2^10221199999 is an apocalyptic number.

10221199999 is a deficient number, since it is larger than the sum of its proper divisors (329716161).

10221199999 is an equidigital number, since it uses as much as digits as its factorization.

10221199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329716160.

The product of its (nonzero) digits is 236196, while the sum is 52.

It can be divided in two parts, 1022 and 1199999, that added together give a palindrome (1201021).

The spelling of 10221199999 in words is "ten billion, two hundred twenty-one million, one hundred ninety-nine thousand, nine hundred ninety-nine".