21233212022 has 16 divisors (see below), whose sum is σ = 35089272144. Its totient is φ = 9555900000.

The previous prime is 21233211997. The next prime is 21233212027. The reversal of 21233212022 is 22021233212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21233211985 and 21233212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233212027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4775729 + ... + 4780172.

It is an arithmetic number, because the mean of its divisors is an integer number (2193079509).

Almost surely, 2^21233212022 is an apocalyptic number.

21233212022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21233212022 is a deficient number, since it is larger than the sum of its proper divisors (13856060122).

21233212022 is a wasteful number, since it uses less digits than its factorization.

21233212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9556015.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21233212022 its reverse (22021233212), we get a palindrome (43254445234).

The spelling of 21233212022 in words is "twenty-one billion, two hundred thirty-three million, two hundred twelve thousand, twenty-two".