203023120031 has 4 divisors (see below), whose sum is σ = 203024550864. Its totient is φ = 203021689200.

The previous prime is 203023120019. The next prime is 203023120033. The reversal of 203023120031 is 130021320302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203023120031 is a prime.

It is a super-2 number, since 2×203023120031² (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 = 203023119991 and 203023120009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203023120033) 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, 475835 + ... + 795276.

It is an arithmetic number, because the mean of its divisors is an integer number (50756137716).

Almost surely, 2^203023120031 is an apocalyptic number.

203023120031 is a deficient number, since it is larger than the sum of its proper divisors (1430833).

203023120031 is a wasteful number, since it uses less digits than its factorization.

203023120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430832.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 203023120031 its reverse (130021320302), we get a palindrome (333044440333).

The spelling of 203023120031 in words is "two hundred three billion, twenty-three million, one hundred twenty thousand, thirty-one".