10123209999 has 12 divisors (see below), whose sum is σ = 16711330896. Its totient is φ = 5784691392.

The previous prime is 10123209989. The next prime is 10123210067. The reversal of 10123209999 is 99990232101.

It is not a de Polignac number, because 10123209999 - 2⁷ = 10123209871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123209959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80342874 + ... + 80342999.

It is an arithmetic number, because the mean of its divisors is an integer number (1392610908).

Almost surely, 2^10123209999 is an apocalyptic number.

10123209999 is a deficient number, since it is larger than the sum of its proper divisors (6588120897).

10123209999 is a wasteful number, since it uses less digits than its factorization.

10123209999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160685886 (or 160685883 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The spelling of 10123209999 in words is "ten billion, one hundred twenty-three million, two hundred nine thousand, nine hundred ninety-nine".