21222021021111 has 24 divisors (see below), whose sum is σ = 30958136904240. Its totient is φ = 14007662592000.

The previous prime is 21222021021101. The next prime is 21222021021119. The reversal of 21222021021111 is 11112012022212.

21222021021111 is a `hidden beast` number, since 2 + 12 + 220 + 210 + 211 + 11 = 666.

It is not a de Polignac number, because 21222021021111 - 2¹¹ = 21222021019063 is a prime.

It is a super-2 number, since 2×21222021021111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222021021119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53632951 + ... + 54027191.

It is an arithmetic number, because the mean of its divisors is an integer number (1289922371010).

Almost surely, 2^{21222021021111} is an apocalyptic number.

21222021021111 is a deficient number, since it is larger than the sum of its proper divisors (9736115883129).

21222021021111 is a wasteful number, since it uses less digits than its factorization.

21222021021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453567 (or 453564 counting only the distinct ones).

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

Adding to 21222021021111 its reverse (11112012022212), we get a palindrome (32334033043323).

The spelling of 21222021021111 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, twenty-one thousand, one hundred eleven".