21022232111 has 4 divisors (see below), whose sum is σ = 22128665400. Its totient is φ = 19915798824.

The previous prime is 21022232081. The next prime is 21022232137. The reversal of 21022232111 is 11123222012.

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 21022232111 - 2¹⁴ = 21022215727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21022232111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022232141) 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, 553216616 + ... + 553216653.

It is an arithmetic number, because the mean of its divisors is an integer number (5532166350).

Almost surely, 2^21022232111 is an apocalyptic number.

21022232111 is a deficient number, since it is larger than the sum of its proper divisors (1106433289).

21022232111 is a wasteful number, since it uses less digits than its factorization.

21022232111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106433288.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21022232111 its reverse (11123222012), we get a palindrome (32145454123).

The spelling of 21022232111 in words is "twenty-one billion, twenty-two million, two hundred thirty-two thousand, one hundred eleven".