2121113320 has 16 divisors (see below), whose sum is σ = 4772505060. Its totient is φ = 848445312.

The previous prime is 2121113297. The next prime is 2121113329. The reversal of 2121113320 is 233111212.

It can be written as a sum of positive squares in 2 ways, for example, as 2023380324 + 97732996 = 44982^2 + 9886^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2121113294 and 2121113303.

It is not an unprimeable number, because it can be changed into a prime (2121113329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26513877 + ... + 26513956.

Almost surely, 2^2121113320 is an apocalyptic number.

2121113320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121113320 is an abundant number, since it is smaller than the sum of its proper divisors (2651391740).

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

2121113320 is a wasteful number, since it uses less digits than its factorization.

2121113320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53027844 (or 53027840 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2121113320 is about 46055.5460286815. The cubic root of 2121113320 is about 1284.8564935351.

Adding to 2121113320 its reverse (233111212), we get a palindrome (2354224532).

The spelling of 2121113320 in words is "two billion, one hundred twenty-one million, one hundred thirteen thousand, three hundred twenty".