21143021199 has 4 divisors (see below), whose sum is σ = 28190694936. Its totient is φ = 14095347464.

The previous prime is 21143021189. The next prime is 21143021231. The reversal of 21143021199 is 99112034112.

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 21143021199 - 2⁷ = 21143021071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143021189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3523836864 + ... + 3523836869.

It is an arithmetic number, because the mean of its divisors is an integer number (7047673734).

Almost surely, 2^21143021199 is an apocalyptic number.

21143021199 is a deficient number, since it is larger than the sum of its proper divisors (7047673737).

21143021199 is an equidigital number, since it uses as much as digits as its factorization.

21143021199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047673736.

The product of its (nonzero) digits is 3888, while the sum is 33.

The spelling of 21143021199 in words is "twenty-one billion, one hundred forty-three million, twenty-one thousand, one hundred ninety-nine".