203112003031421 has 12 divisors (see below), whose sum is σ = 224313424393632. Its totient is φ = 183772169889000.

The previous prime is 203112003031403. The next prime is 203112003031463. The reversal of 203112003031421 is 124130300211302.

It is a de Polignac number, because none of the positive numbers 2^k-203112003031421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203112003031321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3977727065 + ... + 3977778126.

It is an arithmetic number, because the mean of its divisors is an integer number (18692785366136).

Almost surely, 2^{203112003031421} is an apocalyptic number.

It is an amenable number.

203112003031421 is a deficient number, since it is larger than the sum of its proper divisors (21201421362211).

203112003031421 is a wasteful number, since it uses less digits than its factorization.

203112003031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955505424 (or 7955505413 counting only the distinct ones).

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

Adding to 203112003031421 its reverse (124130300211302), we get a palindrome (327242303242723).

The spelling of 203112003031421 in words is "two hundred three trillion, one hundred twelve billion, three million, thirty-one thousand, four hundred twenty-one".