21022210111 has 8 divisors (see below), whose sum is σ = 24040439840. Its totient is φ = 18007744608.

The previous prime is 21022210103. The next prime is 21022210133. The reversal of 21022210111 is 11101222012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21022210111 - 2³ = 21022210103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022210091 and 21022210100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022210411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929076 + ... + 951433.

It is an arithmetic number, because the mean of its divisors is an integer number (3005054980).

Almost surely, 2^21022210111 is an apocalyptic number.

21022210111 is a deficient number, since it is larger than the sum of its proper divisors (3018229729).

21022210111 is a wasteful number, since it uses less digits than its factorization.

21022210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882113.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21022210111 its reverse (11101222012), we get a palindrome (32123432123).

The spelling of 21022210111 in words is "twenty-one billion, twenty-two million, two hundred ten thousand, one hundred eleven".