21132223120 has 40 divisors (see below), whose sum is σ = 49185479160. Its totient is φ = 8443760640.

The previous prime is 21132223087. The next prime is 21132223139. The reversal of 21132223120 is 2132223112.

It can be written as a sum of positive squares in 4 ways, for example, as 196448256 + 20935774864 = 14016^2 + 144692^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 67851 + ... + 216490.

It is an arithmetic number, because the mean of its divisors is an integer number (1229636979).

Almost surely, 2^21132223120 is an apocalyptic number.

21132223120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21132223120 is an abundant number, since it is smaller than the sum of its proper divisors (28053256040).

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

21132223120 is a wasteful number, since it uses less digits than its factorization.

21132223120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285283 (or 285277 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21132223120 its reverse (2132223112), we get a palindrome (23264446232).

The spelling of 21132223120 in words is "twenty-one billion, one hundred thirty-two million, two hundred twenty-three thousand, one hundred twenty".