21221114011 has 4 divisors (see below), whose sum is σ = 21256900632. Its totient is φ = 21185327392.

The previous prime is 21221114009. The next prime is 21221114039. The reversal of 21221114011 is 11041112212.

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 21221114011 - 2¹ = 21221114009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221114071) 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, 17892421 + ... + 17893606.

It is an arithmetic number, because the mean of its divisors is an integer number (5314225158).

Almost surely, 2^21221114011 is an apocalyptic number.

21221114011 is a deficient number, since it is larger than the sum of its proper divisors (35786621).

21221114011 is an equidigital number, since it uses as much as digits as its factorization.

21221114011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35786620.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221114011 its reverse (11041112212), we get a palindrome (32262226223).

The spelling of 21221114011 in words is "twenty-one billion, two hundred twenty-one million, one hundred fourteen thousand, eleven".