203123102021123 has 16 divisors (see below), whose sum is σ = 207846090339840. Its totient is φ = 198416847996576.

The previous prime is 203123102021057. The next prime is 203123102021129. The reversal of 203123102021123 is 321120201321302.

203123102021123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 203123102021123 - 2³⁴ = 203105922151939 is a prime.

It is a super-2 number, since 2×203123102021123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203123102021129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2151748961 + ... + 2151843357.

It is an arithmetic number, because the mean of its divisors is an integer number (12990380646240).

Almost surely, 2^{203123102021123} is an apocalyptic number.

203123102021123 is a deficient number, since it is larger than the sum of its proper divisors (4722988318717).

203123102021123 is an equidigital number, since it uses as much as digits as its factorization.

203123102021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182506.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 203123102021123 its reverse (321120201321302), we get a palindrome (524243303342425).

The spelling of 203123102021123 in words is "two hundred three trillion, one hundred twenty-three billion, one hundred two million, twenty-one thousand, one hundred twenty-three".