21422101111 has 16 divisors (see below), whose sum is σ = 22580244288. Its totient is φ = 20302048000.

The previous prime is 21422101073. The next prime is 21422101139. The reversal of 21422101111 is 11110122412.

It is a cyclic number.

It is not a de Polignac number, because 21422101111 - 2⁷ = 21422100983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422101411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170670 + ... + 268276.

It is an arithmetic number, because the mean of its divisors is an integer number (1411265268).

Almost surely, 2^21422101111 is an apocalyptic number.

21422101111 is a deficient number, since it is larger than the sum of its proper divisors (1158143177).

21422101111 is a wasteful number, since it uses less digits than its factorization.

21422101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97802.

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

Adding to 21422101111 its reverse (11110122412), we get a palindrome (32532223523).

The spelling of 21422101111 in words is "twenty-one billion, four hundred twenty-two million, one hundred one thousand, one hundred eleven".