2121320232 has 64 divisors (see below), whose sum is σ = 5980545600. Its totient is φ = 696548160.

The previous prime is 2121320209. The next prime is 2121320233. The reversal of 2121320232 is 2320231212.

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

It is not an unprimeable number, because it can be changed into a prime (2121320233) 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, 58819 + ... + 87762.

It is an arithmetic number, because the mean of its divisors is an integer number (93446025).

Almost surely, 2^2121320232 is an apocalyptic number.

It is an amenable number.

2121320232 is an abundant number, since it is smaller than the sum of its proper divisors (3859225368).

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

2121320232 is a wasteful number, since it uses less digits than its factorization.

2121320232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146663 (or 146653 counting only the distinct ones).

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

The square root of 2121320232 is about 46057.7923048858. The cubic root of 2121320232 is about 1284.8982709012.

Adding to 2121320232 its reverse (2320231212), we get a palindrome (4441551444).

The spelling of 2121320232 in words is "two billion, one hundred twenty-one million, three hundred twenty thousand, two hundred thirty-two".