21442233211 has 8 divisors (see below), whose sum is σ = 24567139040. Its totient is φ = 18332759808.

The previous prime is 21442233193. The next prime is 21442233217. The reversal of 21442233211 is 11233224412.

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 21442233211 - 2¹¹ = 21442231163 is a prime.

It is a super-2 number, since 2×21442233211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442233217) 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, 3855126 + ... + 3860683.

It is an arithmetic number, because the mean of its divisors is an integer number (3070892380).

Almost surely, 2^21442233211 is an apocalyptic number.

21442233211 is a deficient number, since it is larger than the sum of its proper divisors (3124905829).

21442233211 is an equidigital number, since it uses as much as digits as its factorization.

21442233211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7716213.

The product of its digits is 2304, while the sum is 25.

Adding to 21442233211 its reverse (11233224412), we get a palindrome (32675457623).

The spelling of 21442233211 in words is "twenty-one billion, four hundred forty-two million, two hundred thirty-three thousand, two hundred eleven".