21233221020220 has 72 divisors (see below), whose sum is σ = 50378577329808. Its totient is φ = 7454923929600.

The previous prime is 21233221020199. The next prime is 21233221020251. The reversal of 21233221020220 is 2202012233212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21233221020191 and 21233221020200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57195861 + ... + 57565900.

It is an arithmetic number, because the mean of its divisors is an integer number (699702462914).

Almost surely, 2^{21233221020220} is an apocalyptic number.

21233221020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233221020220 is an abundant number, since it is smaller than the sum of its proper divisors (29145356309588).

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

21233221020220 is a wasteful number, since it uses less digits than its factorization.

21233221020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114761839 (or 114761808 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21233221020220 its reverse (2202012233212), we get a palindrome (23435233253432).

The spelling of 21233221020220 in words is "twenty-one trillion, two hundred thirty-three billion, two hundred twenty-one million, twenty thousand, two hundred twenty".