203131021311011 has 4 divisors (see below), whose sum is σ = 204018056338800. Its totient is φ = 202243986283224.

The previous prime is 203131021310999. The next prime is 203131021311041. The reversal of 203131021311011 is 110113120131302.

203131021311011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-203131021311011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203131021311041) 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, 443517513551 + ... + 443517514008.

It is an arithmetic number, because the mean of its divisors is an integer number (51004514084700).

Almost surely, 2^{203131021311011} is an apocalyptic number.

203131021311011 is a deficient number, since it is larger than the sum of its proper divisors (887035027789).

203131021311011 is an equidigital number, since it uses as much as digits as its factorization.

203131021311011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887035027788.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 203131021311011 its reverse (110113120131302), we get a palindrome (313244141442313).

The spelling of 203131021311011 in words is "two hundred three trillion, one hundred thirty-one billion, twenty-one million, three hundred eleven thousand, eleven".