21422231011 has 4 divisors (see below), whose sum is σ = 21585759624. Its totient is φ = 21258702400.

The previous prime is 21422230993. The next prime is 21422231021. The reversal of 21422231011 is 11013222412.

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 21422231011 - 2⁷ = 21422230883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21422231011.

It is not an unprimeable number, because it can be changed into a prime (21422231021) 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, 81764110 + ... + 81764371.

It is an arithmetic number, because the mean of its divisors is an integer number (5396439906).

Almost surely, 2^21422231011 is an apocalyptic number.

21422231011 is a deficient number, since it is larger than the sum of its proper divisors (163528613).

21422231011 is a wasteful number, since it uses less digits than its factorization.

21422231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163528612.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21422231011 its reverse (11013222412), we get a palindrome (32435453423).

It can be divided in two parts, 214 and 22231011, that added together give a square (22231225 = 4715²).

The spelling of 21422231011 in words is "twenty-one billion, four hundred twenty-two million, two hundred thirty-one thousand, eleven".