203012101031 has 4 divisors (see below), whose sum is σ = 203113053864. Its totient is φ = 202911148200.

The previous prime is 203012101021. The next prime is 203012101073. The reversal of 203012101031 is 130101210302.

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-203012101031 is a prime.

It is a super-2 number, since 2×203012101031² (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 = 203012100997 and 203012101015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203012101021) 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, 50473400 + ... + 50477421.

It is an arithmetic number, because the mean of its divisors is an integer number (50778263466).

Almost surely, 2^203012101031 is an apocalyptic number.

203012101031 is a deficient number, since it is larger than the sum of its proper divisors (100952833).

203012101031 is a wasteful number, since it uses less digits than its factorization.

203012101031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100952832.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 203012101031 its reverse (130101210302), we get a palindrome (333113311333).

The spelling of 203012101031 in words is "two hundred three billion, twelve million, one hundred one thousand, thirty-one".