102503121923 has 4 divisors (see below), whose sum is σ = 103498297968. Its totient is φ = 101507945880.

The previous prime is 102503121899. The next prime is 102503121943. The reversal of 102503121923 is 329121305201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102503121923 - 2⁶ = 102503121859 is a prime.

It is a super-2 number, since 2×102503121923² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102503121943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497587868 + ... + 497588073.

It is an arithmetic number, because the mean of its divisors is an integer number (25874574492).

Almost surely, 2^102503121923 is an apocalyptic number.

102503121923 is a deficient number, since it is larger than the sum of its proper divisors (995176045).

102503121923 is an equidigital number, since it uses as much as digits as its factorization.

102503121923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995176044.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 102503121923 in words is "one hundred two billion, five hundred three million, one hundred twenty-one thousand, nine hundred twenty-three".