2123131201 has 4 divisors (see below), whose sum is σ = 2144152404. Its totient is φ = 2102110000.

The previous prime is 2123131181. The next prime is 2123131211. The reversal of 2123131201 is 1021313212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1564281601 + 558849600 = 39551^2 + 23640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123131201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123131211) 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, 10510450 + ... + 10510651.

It is an arithmetic number, because the mean of its divisors is an integer number (536038101).

Almost surely, 2^2123131201 is an apocalyptic number.

It is an amenable number.

2123131201 is a deficient number, since it is larger than the sum of its proper divisors (21021203).

2123131201 is a wasteful number, since it uses less digits than its factorization.

2123131201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21021202.

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

The square root of 2123131201 is about 46077.4478568421. The cubic root of 2123131201 is about 1285.2638056996.

Adding to 2123131201 its reverse (1021313212), we get a palindrome (3144444413).

The spelling of 2123131201 in words is "two billion, one hundred twenty-three million, one hundred thirty-one thousand, two hundred one".