2123105320 has 96 divisors (see below), whose sum is σ = 5581953000. Its totient is φ = 724641792.

The previous prime is 2123105317. The next prime is 2123105351. The reversal of 2123105320 is 235013212.

It can be written as a sum of positive squares in 4 ways, for example, as 1933712676 + 189392644 = 43974^2 + 13762^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454356 + ... + 459004.

Almost surely, 2^2123105320 is an apocalyptic number.

2123105320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123105320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2790976500).

2123105320 is an abundant number, since it is smaller than the sum of its proper divisors (3458847680).

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

2123105320 is a wasteful number, since it uses less digits than its factorization.

2123105320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907 (or 4896 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2123105320 is about 46077.1670136088. The cubic root of 2123105320 is about 1285.2585832169.

Adding to 2123105320 its reverse (235013212), we get a palindrome (2358118532).

The spelling of 2123105320 in words is "two billion, one hundred twenty-three million, one hundred five thousand, three hundred twenty".