21342223311 has 4 divisors (see below), whose sum is σ = 28456297752. Its totient is φ = 14228148872.

The previous prime is 21342223307. The next prime is 21342223333. The reversal of 21342223311 is 11332224312.

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 21342223311 - 2² = 21342223307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342223211) 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, 3557037216 + ... + 3557037221.

It is an arithmetic number, because the mean of its divisors is an integer number (7114074438).

Almost surely, 2^21342223311 is an apocalyptic number.

21342223311 is a deficient number, since it is larger than the sum of its proper divisors (7114074441).

21342223311 is an equidigital number, since it uses as much as digits as its factorization.

21342223311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114074440.

The product of its digits is 1728, while the sum is 24.

Adding to 21342223311 its reverse (11332224312), we get a palindrome (32674447623).

The spelling of 21342223311 in words is "twenty-one billion, three hundred forty-two million, two hundred twenty-three thousand, three hundred eleven".