10123987217 has 2 divisors, whose sum is σ = 10123987218. Its totient is φ = 10123987216.

The previous prime is 10123987207. The next prime is 10123987219. The reversal of 10123987217 is 71278932101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8177765761 + 1946221456 = 90431^2 + 44116^2 .

It is a cyclic number.

It is not a de Polignac number, because 10123987217 - 2²² = 10119792913 is a prime.

Together with 10123987219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10123987219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061993608 + 5061993609.

It is an arithmetic number, because the mean of its divisors is an integer number (5061993609).

Almost surely, 2^10123987217 is an apocalyptic number.

It is an amenable number.

10123987217 is a deficient number, since it is larger than the sum of its proper divisors (1).

10123987217 is an equidigital number, since it uses as much as digits as its factorization.

10123987217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 10123987217 in words is "ten billion, one hundred twenty-three million, nine hundred eighty-seven thousand, two hundred seventeen".