22011211221021 has 64 divisors (see below), whose sum is σ = 36913660692480. Its totient is φ = 12846372336000.

The previous prime is 22011211221017. The next prime is 22011211221037. The reversal of 22011211221021 is 12012211211022.

22011211221021 is a `hidden beast` number, since 220 + 1 + 1 + 211 + 2 + 210 + 21 = 666.

It is not a de Polignac number, because 22011211221021 - 2² = 22011211221017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011211220985 and 22011211221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011211221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11230800 + ... + 13044281.

It is an arithmetic number, because the mean of its divisors is an integer number (576775948320).

Almost surely, 2^{22011211221021} is an apocalyptic number.

It is an amenable number.

22011211221021 is a deficient number, since it is larger than the sum of its proper divisors (14902449471459).

22011211221021 is a wasteful number, since it uses less digits than its factorization.

22011211221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24275215 (or 24275209 counting only the distinct ones).

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

Adding to 22011211221021 its reverse (12012211211022), we get a palindrome (34023422432043).

Subtracting from 22011211221021 its reverse (12012211211022), we obtain a palindrome (9999000009999).

The spelling of 22011211221021 in words is "twenty-two trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, twenty-one".