21222143411 has 4 divisors (see below), whose sum is σ = 24253878192. Its totient is φ = 18190408632.

The previous prime is 21222143407. The next prime is 21222143413. The reversal of 21222143411 is 11434122212.

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 21222143411 - 2² = 21222143407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222143413) 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, 1515867380 + ... + 1515867393.

It is an arithmetic number, because the mean of its divisors is an integer number (6063469548).

Almost surely, 2^21222143411 is an apocalyptic number.

21222143411 is a deficient number, since it is larger than the sum of its proper divisors (3031734781).

21222143411 is an equidigital number, since it uses as much as digits as its factorization.

21222143411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031734780.

The product of its digits is 768, while the sum is 23.

Adding to 21222143411 its reverse (11434122212), we get a palindrome (32656265623).

The spelling of 21222143411 in words is "twenty-one billion, two hundred twenty-two million, one hundred forty-three thousand, four hundred eleven".