2121220332 has 96 divisors (see below), whose sum is σ = 6856496640. Its totient is φ = 550964160.

The previous prime is 2121220303. The next prime is 2121220357. The reversal of 2121220332 is 2330221212.

2121220332 is a `hidden beast` number, since 212 + 122 + 0 + 332 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119223 + ... + 135854.

It is an arithmetic number, because the mean of its divisors is an integer number (71421840).

Almost surely, 2^2121220332 is an apocalyptic number.

2121220332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2121220332 is an abundant number, since it is smaller than the sum of its proper divisors (4735276308).

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

2121220332 is a wasteful number, since it uses less digits than its factorization.

2121220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255108 (or 255100 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2121220332 is about 46056.7077850773. The cubic root of 2121220332 is about 1284.8781005453.

Adding to 2121220332 its reverse (2330221212), we get a palindrome (4451441544).

The spelling of 2121220332 in words is "two billion, one hundred twenty-one million, two hundred twenty thousand, three hundred thirty-two".