21233231332220 has 24 divisors (see below), whose sum is σ = 44594289777408. Its totient is φ = 8492434632000.

The previous prime is 21233231332217. The next prime is 21233231332303. The reversal of 21233231332220 is 2223313233212.

It is a super-2 number, since 2×21233231332220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53415836 + ... + 53811875.

It is an arithmetic number, because the mean of its divisors is an integer number (1858095407392).

Almost surely, 2^{21233231332220} is an apocalyptic number.

21233231332220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233231332220 is an abundant number, since it is smaller than the sum of its proper divisors (23361058445188).

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

21233231332220 is a wasteful number, since it uses less digits than its factorization.

21233231332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107237621 (or 107237619 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 21233231332220 its reverse (2223313233212), we get a palindrome (23456544565432).

It can be divided in two parts, 2123323 and 1332220, that added together give a palindrome (3455543).

The spelling of 21233231332220 in words is "twenty-one trillion, two hundred thirty-three billion, two hundred thirty-one million, three hundred thirty-two thousand, two hundred twenty".