21223103211020 has 12 divisors (see below), whose sum is σ = 44568516743184. Its totient is φ = 8489241284400.

The previous prime is 21223103211007. The next prime is 21223103211029. The reversal of 21223103211020 is 2011230132212.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1061155160551 = 21223103211020 / (2 + 1 + 2 + 2 + 3 + 1 + 0 + 3 + 2 + 1 + 1 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 21223103210983 and 21223103211001.

It is not an unprimeable number, because it can be changed into a prime (21223103211029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530577580256 + ... + 530577580295.

It is an arithmetic number, because the mean of its divisors is an integer number (3714043061932).

Almost surely, 2^{21223103211020} is an apocalyptic number.

21223103211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223103211020 is an abundant number, since it is smaller than the sum of its proper divisors (23345413532164).

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

21223103211020 is a wasteful number, since it uses less digits than its factorization.

21223103211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061155160560 (or 1061155160558 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21223103211020 its reverse (2011230132212), we get a palindrome (23234333343232).

The spelling of 21223103211020 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred three million, two hundred eleven thousand, twenty".