21022222111101 has 24 divisors (see below), whose sum is σ = 32935820017464. Its totient is φ = 12868696458240.

The previous prime is 21022222111073. The next prime is 21022222111103. The reversal of 21022222111101 is 10111122222012.

21022222111101 is a `hidden beast` number, since 210 + 22 + 222 + 111 + 101 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5086964484900 + 15935257626201 = 2255430^2 + 3991899^2 .

It is not a de Polignac number, because 21022222111101 - 2²² = 21022217916797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022222111103) 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, 1675605246 + ... + 1675617791.

It is an arithmetic number, because the mean of its divisors is an integer number (1372325834061).

Almost surely, 2^{21022222111101} is an apocalyptic number.

It is an amenable number.

21022222111101 is a deficient number, since it is larger than the sum of its proper divisors (11913597906363).

21022222111101 is a wasteful number, since it uses less digits than its factorization.

21022222111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351223101 (or 3351223098 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21022222111101 its reverse (10111122222012), we get a palindrome (31133344333113).

The spelling of 21022222111101 in words is "twenty-one trillion, twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, one hundred one".