21840022211 has 12 divisors (see below), whose sum is σ = 25822231200. Its totient is φ = 18413130960.

The previous prime is 21840022201. The next prime is 21840022249. The reversal of 21840022211 is 11222004812.

It is not a de Polignac number, because 21840022211 - 2¹⁸ = 21839760067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21840022201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3650411 + ... + 3656388.

It is an arithmetic number, because the mean of its divisors is an integer number (2151852600).

Almost surely, 2^21840022211 is an apocalyptic number.

21840022211 is a deficient number, since it is larger than the sum of its proper divisors (3982208989).

21840022211 is an equidigital number, since it uses as much as digits as its factorization.

21840022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7306874 (or 7306867 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The spelling of 21840022211 in words is "twenty-one billion, eight hundred forty million, twenty-two thousand, two hundred eleven".