21222030011 has 24 divisors (see below), whose sum is σ = 27304485600. Its totient is φ = 16060974336.

The previous prime is 21222029977. The next prime is 21222030017. The reversal of 21222030011 is 11003022212.

It is a happy number.

It is not a de Polignac number, because 21222030011 - 2²² = 21217835707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222030017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172286 + ... + 268563.

It is an arithmetic number, because the mean of its divisors is an integer number (1137686900).

Almost surely, 2^21222030011 is an apocalyptic number.

21222030011 is a deficient number, since it is larger than the sum of its proper divisors (6082455589).

21222030011 is a wasteful number, since it uses less digits than its factorization.

21222030011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440915 (or 440892 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21222030011 its reverse (11003022212), we get a palindrome (32225052223).

The spelling of 21222030011 in words is "twenty-one billion, two hundred twenty-two million, thirty thousand, eleven".