10123987213 has 4 divisors (see below), whose sum is σ = 10186097728. Its totient is φ = 10061876700.

The previous prime is 10123987207. The next prime is 10123987217. The reversal of 10123987213 is 31278932101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31278932101 = 137 ⋅228313373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10123987213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123987217) 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 3 ways as a sum of consecutive naturals, for example, 31055013 + ... + 31055338.

It is an arithmetic number, because the mean of its divisors is an integer number (2546524432).

Almost surely, 2^10123987213 is an apocalyptic number.

It is an amenable number.

10123987213 is a deficient number, since it is larger than the sum of its proper divisors (62110515).

10123987213 is an equidigital number, since it uses as much as digits as its factorization.

10123987213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62110514.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 10123987213 in words is "ten billion, one hundred twenty-three million, nine hundred eighty-seven thousand, two hundred thirteen".