2123431312 has 10 divisors (see below), whose sum is σ = 4114148198. Its totient is φ = 1061715648.

The previous prime is 2123431267. The next prime is 2123431319. The reversal of 2123431312 is 2131343212.

It can be written as a sum of positive squares in only one way, i.e., 1792336896 + 331094416 = 42336^2 + 18196^2 .

It is not an unprimeable number, because it can be changed into a prime (2123431319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66357213 + ... + 66357244.

Almost surely, 2^2123431312 is an apocalyptic number.

It is an amenable number.

2123431312 is a deficient number, since it is larger than the sum of its proper divisors (1990716886).

2123431312 is a wasteful number, since it uses less digits than its factorization.

2123431312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132714465 (or 132714459 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 2123431312 is about 46080.7043348949. The cubic root of 2123431312 is about 1285.3243614851.

Adding to 2123431312 its reverse (2131343212), we get a palindrome (4254774524).

The spelling of 2123431312 in words is "two billion, one hundred twenty-three million, four hundred thirty-one thousand, three hundred twelve".