21232111133220 has 48 divisors (see below), whose sum is σ = 64022981265600. Its totient is φ = 5226365817216.

The previous prime is 21232111133209. The next prime is 21232111133227. The reversal of 21232111133220 is 2233111123212.

It is not an unprimeable number, because it can be changed into a prime (21232111133227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13610326870 + ... + 13610328429.

It is an arithmetic number, because the mean of its divisors is an integer number (1333812109700).

Almost surely, 2^{21232111133220} is an apocalyptic number.

21232111133220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232111133220 is an abundant number, since it is smaller than the sum of its proper divisors (42790870132380).

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

21232111133220 is a wasteful number, since it uses less digits than its factorization.

21232111133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27220655324 (or 27220655322 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21232111133220 its reverse (2233111123212), we get a palindrome (23465222256432).

The spelling of 21232111133220 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred eleven million, one hundred thirty-three thousand, two hundred twenty".