21112212022 has 16 divisors (see below), whose sum is σ = 34549636032. Its totient is φ = 9595798920.

The previous prime is 21112211993. The next prime is 21112212067. The reversal of 21112212022 is 22021221112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21112211987 and 21112212005.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 451213 + ... + 495799.

It is an arithmetic number, because the mean of its divisors is an integer number (2159352252).

Almost surely, 2^21112212022 is an apocalyptic number.

21112212022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112212022 is a deficient number, since it is larger than the sum of its proper divisors (13437424010).

21112212022 is a wasteful number, since it uses less digits than its factorization.

21112212022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66123.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21112212022 its reverse (22021221112), we get a palindrome (43133433134).

The spelling of 21112212022 in words is "twenty-one billion, one hundred twelve million, two hundred twelve thousand, twenty-two".