203123020123 has 8 divisors (see below), whose sum is σ = 208110188160. Its totient is φ = 198137421120.

The previous prime is 203123020091. The next prime is 203123020141. The reversal of 203123020123 is 321020321302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203123020123 - 2⁵ = 203123020091 is a prime.

It is a super-2 number, since 2×203123020123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203123020123.

It is not an unprimeable number, because it can be changed into a prime (203123020153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128008 + ... + 650101.

It is an arithmetic number, because the mean of its divisors is an integer number (26013773520).

Almost surely, 2^203123020123 is an apocalyptic number.

203123020123 is a deficient number, since it is larger than the sum of its proper divisors (4987168037).

203123020123 is an equidigital number, since it uses as much as digits as its factorization.

203123020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784517.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203123020123 its reverse (321020321302), we get a palindrome (524143341425).

The spelling of 203123020123 in words is "two hundred three billion, one hundred twenty-three million, twenty thousand, one hundred twenty-three".