21232010332220 has 24 divisors (see below), whose sum is σ = 44595245544864. Its totient is φ = 8491275781056.

The previous prime is 21232010332189. The next prime is 21232010332223. The reversal of 21232010332220 is 2223301023212.

It is a super-3 number, since 3×21232010332220³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232010332223) 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, 95408072 + ... + 95630351.

It is an arithmetic number, because the mean of its divisors is an integer number (1858135231036).

Almost surely, 2^{21232010332220} is an apocalyptic number.

21232010332220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232010332220 is an abundant number, since it is smaller than the sum of its proper divisors (23363235212644).

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

21232010332220 is a wasteful number, since it uses less digits than its factorization.

21232010332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191043989 (or 191043987 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21232010332220 its reverse (2223301023212), we get a palindrome (23455311355432).

The spelling of 21232010332220 in words is "twenty-one trillion, two hundred thirty-two billion, ten million, three hundred thirty-two thousand, two hundred twenty".