2120121320 has 16 divisors (see below), whose sum is σ = 4770273060. Its totient is φ = 848048512.

The previous prime is 2120121319. The next prime is 2120121331. The reversal of 2120121320 is 231210212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2104423876 + 15697444 = 45874^2 + 3962^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2120121295 and 2120121304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26501477 + ... + 26501556.

Almost surely, 2^2120121320 is an apocalyptic number.

2120121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120121320 is an abundant number, since it is smaller than the sum of its proper divisors (2650151740).

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

2120121320 is a wasteful number, since it uses less digits than its factorization.

2120121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53003044 (or 53003040 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2120121320 is about 46044.7751650499. The cubic root of 2120121320 is about 1284.6561621999.

Adding to 2120121320 its reverse (231210212), we get a palindrome (2351331532).

The spelling of 2120121320 in words is "two billion, one hundred twenty million, one hundred twenty-one thousand, three hundred twenty".