203212301123 has 4 divisors (see below), whose sum is σ = 218844016608. Its totient is φ = 187580585640.

The previous prime is 203212301113. The next prime is 203212301147. The reversal of 203212301123 is 321103212302.

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 203212301123 - 2¹⁸ = 203212038979 is a prime.

It is a super-2 number, since 2×203212301123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203212301095 and 203212301104.

It is not an unprimeable number, because it can be changed into a prime (203212301113) 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, 7815857723 + ... + 7815857748.

It is an arithmetic number, because the mean of its divisors is an integer number (54711004152).

Almost surely, 2^203212301123 is an apocalyptic number.

203212301123 is a deficient number, since it is larger than the sum of its proper divisors (15631715485).

203212301123 is a wasteful number, since it uses less digits than its factorization.

203212301123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15631715484.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 203212301123 its reverse (321103212302), we get a palindrome (524315513425).

The spelling of 203212301123 in words is "two hundred three billion, two hundred twelve million, three hundred one thousand, one hundred twenty-three".