203111130001 has 24 divisors (see below), whose sum is σ = 229707250920. Its totient is φ = 178318812672.

The previous prime is 203111129981. The next prime is 203111130007. The reversal of 203111130001 is 100031111302.

It can be written as a sum of positive squares in 4 ways, for example, as 43922099776 + 159189030225 = 209576^2 + 398985^2 .

It is not a de Polignac number, because 203111130001 - 2¹³ = 203111121809 is a prime.

It is a super-2 number, since 2×203111130001² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203111130007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1632345 + ... + 1752361.

It is an arithmetic number, because the mean of its divisors is an integer number (9571135455).

Almost surely, 2^203111130001 is an apocalyptic number.

It is an amenable number.

203111130001 is a deficient number, since it is larger than the sum of its proper divisors (26596120919).

203111130001 is a wasteful number, since it uses less digits than its factorization.

203111130001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120193 (or 120126 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 203111130001 its reverse (100031111302), we get a palindrome (303142241303).

The spelling of 203111130001 in words is "two hundred three billion, one hundred eleven million, one hundred thirty thousand, one".