2123001231 has 64 divisors (see below), whose sum is σ = 3252856320. Its totient is φ = 1222341120.

The previous prime is 2123001143. The next prime is 2123001253. The reversal of 2123001231 is 1321003212.

It is not a de Polignac number, because 2123001231 - 2⁷ = 2123001103 is a prime.

It is a super-2 number, since 2×2123001231² = 9014268453655030722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2123001231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123001931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6413736 + ... + 6414066.

It is an arithmetic number, because the mean of its divisors is an integer number (50825880).

Almost surely, 2^2123001231 is an apocalyptic number.

2123001231 is a deficient number, since it is larger than the sum of its proper divisors (1129855089).

2123001231 is a wasteful number, since it uses less digits than its factorization.

2123001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2123001231 is about 46076.0374923886. The cubic root of 2123001231 is about 1285.2375788472.

Adding to 2123001231 its reverse (1321003212), we get a palindrome (3444004443).

It can be divided in two parts, 212300 and 1231, that added together give a triangular number (213531 = T₆₅₃).

The spelling of 2123001231 in words is "two billion, one hundred twenty-three million, one thousand, two hundred thirty-one".