21221000111122 has 64 divisors (see below), whose sum is σ = 36981478195200. Its totient is φ = 8945126902080.

The previous prime is 21221000111117. The next prime is 21221000111123. The reversal of 21221000111122 is 22111100012212.

It is a junction number, because it is equal to n+sod(n) for n = 21221000111096 and 21221000111105.

It is not an unprimeable number, because it can be changed into a prime (21221000111123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235119279 + ... + 235209517.

It is an arithmetic number, because the mean of its divisors is an integer number (577835596800).

Almost surely, 2^{21221000111122} is an apocalyptic number.

21221000111122 is a deficient number, since it is larger than the sum of its proper divisors (15760478084078).

21221000111122 is a wasteful number, since it uses less digits than its factorization.

21221000111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91231.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221000111122 its reverse (22111100012212), we get a palindrome (43332100123334).

The spelling of 21221000111122 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred eleven thousand, one hundred twenty-two".