13123012312 has 8 divisors (see below), whose sum is σ = 24605648100. Its totient is φ = 6561506152.

The previous prime is 13123012237. The next prime is 13123012313. The reversal of 13123012312 is 21321032131.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 13123012312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123012313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820188262 + ... + 820188277.

Almost surely, 2^13123012312 is an apocalyptic number.

It is an amenable number.

13123012312 is a deficient number, since it is larger than the sum of its proper divisors (11482635788).

13123012312 is a wasteful number, since it uses less digits than its factorization.

13123012312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640376545 (or 1640376541 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13123012312 its reverse (21321032131), we get a palindrome (34444044443).

The spelling of 13123012312 in words is "thirteen billion, one hundred twenty-three million, twelve thousand, three hundred twelve".