203003312001311 has 32 divisors (see below), whose sum is σ = 205428963801600. Its totient is φ = 200595267939456.

The previous prime is 203003312001307. The next prime is 203003312001389. The reversal of 203003312001311 is 113100213300302.

It is a cyclic number.

It is not a de Polignac number, because 203003312001311 - 2² = 203003312001307 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 (203003312007311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75214267640 + ... + 75214270338.

It is an arithmetic number, because the mean of its divisors is an integer number (6419655118800).

Almost surely, 2^{203003312001311} is an apocalyptic number.

203003312001311 is a deficient number, since it is larger than the sum of its proper divisors (2425651800289).

203003312001311 is a wasteful number, since it uses less digits than its factorization.

203003312001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 203003312001311 its reverse (113100213300302), we get a palindrome (316103525301613).

The spelling of 203003312001311 in words is "two hundred three trillion, three billion, three hundred twelve million, one thousand, three hundred eleven".