2121442320 has 40 divisors (see below), whose sum is σ = 6576471936. Its totient is φ = 565717888.

The previous prime is 2121442303. The next prime is 2121442331. The reversal of 2121442320 is 232441212.

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, 4419432 + ... + 4419911.

Almost surely, 2^2121442320 is an apocalyptic number.

2121442320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121442320 is an abundant number, since it is smaller than the sum of its proper divisors (4455029616).

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

2121442320 is a wasteful number, since it uses less digits than its factorization.

2121442320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8839359 (or 8839353 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2121442320 is about 46059.1176641498. The cubic root of 2121442320 is about 1284.9229202757.

Adding to 2121442320 its reverse (232441212), we get a palindrome (2353883532).

The spelling of 2121442320 in words is "two billion, one hundred twenty-one million, four hundred forty-two thousand, three hundred twenty".