21210222022022 has 32 divisors (see below), whose sum is σ = 35556437476224. Its totient is φ = 9405261908800.

The previous prime is 21210222022021. The next prime is 21210222022057. The reversal of 21210222022022 is 22022022201212.

It is a junction number, because it is equal to n+sod(n) for n = 21210222021985 and 21210222022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210222022021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13510313 + ... + 14998299.

It is an arithmetic number, because the mean of its divisors is an integer number (1111138671132).

Almost surely, 2^{21210222022022} is an apocalyptic number.

21210222022022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210222022022 is a deficient number, since it is larger than the sum of its proper divisors (14346215454202).

21210222022022 is a wasteful number, since it uses less digits than its factorization.

21210222022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503844.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21210222022022 its reverse (22022022201212), we get a palindrome (43232244223234).

The spelling of 21210222022022 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, twenty-two thousand, twenty-two".