2123201320 has 32 divisors (see below), whose sum is σ = 4804832520. Its totient is φ = 844368640.

The previous prime is 2123201287. The next prime is 2123201351. The reversal of 2123201320 is 231023212.

It can be written as a sum of positive squares in 4 ways, for example, as 2089769796 + 33431524 = 45714^2 + 5782^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2123201294 and 2123201303.

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, 146491 + ... + 160330.

Almost surely, 2^2123201320 is an apocalyptic number.

2123201320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123201320 is an abundant number, since it is smaller than the sum of its proper divisors (2681631200).

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

2123201320 is a wasteful number, since it uses less digits than its factorization.

2123201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307005 (or 307001 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2123201320 is about 46078.2087325451. The cubic root of 2123201320 is about 1285.2779546793.

Adding to 2123201320 its reverse (231023212), we get a palindrome (2354224532).

The spelling of 2123201320 in words is "two billion, one hundred twenty-three million, two hundred one thousand, three hundred twenty".