21221022011022 has 240 divisors, whose sum is σ = 50288674989168. Its totient is φ = 6687341337600.

The previous prime is 21221022011011. The next prime is 21221022011041. The reversal of 21221022011022 is 22011022012212.

It is a happy number.

21221022011022 is a `hidden beast` number, since 212 + 210 + 220 + 1 + 1 + 0 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21221022010986 and 21221022011004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 5825148333 + ... + 5825151975.

Almost surely, 2^{21221022011022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21221022011022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25144337494584).

21221022011022 is an abundant number, since it is smaller than the sum of its proper divisors (29067652978146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221022011022 is a wasteful number, since it uses less digits than its factorization.

21221022011022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4477 (or 4445 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21221022011022 its reverse (22011022012212), we get a palindrome (43232044023234).

The spelling of 21221022011022 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-two million, eleven thousand, twenty-two".