21222021010120 has 32 divisors (see below), whose sum is σ = 54570911169600. Its totient is φ = 7276121489088.

The previous prime is 21222021010109. The next prime is 21222021010129. The reversal of 21222021010120 is 2101012022212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21222021010094 and 21222021010103.

It is not an unprimeable number, because it can be changed into a prime (21222021010129) 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 7 ways as a sum of consecutive naturals, for example, 37896465810 + ... + 37896466369.

It is an arithmetic number, because the mean of its divisors is an integer number (1705340974050).

Almost surely, 2^{21222021010120} is an apocalyptic number.

21222021010120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222021010120 is an abundant number, since it is smaller than the sum of its proper divisors (33348890159480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222021010120 is a wasteful number, since it uses less digits than its factorization.

21222021010120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75792932197 (or 75792932193 counting only the distinct ones).

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

Adding to 21222021010120 its reverse (2101012022212), we get a palindrome (23323033032332).

The spelling of 21222021010120 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, ten thousand, one hundred twenty".