203111034431123 has 32 divisors (see below), whose sum is σ = 258720302668800. Its totient is φ = 155091308674176.

The previous prime is 203111034431119. The next prime is 203111034431141. The reversal of 203111034431123 is 321134430111302.

It is not a de Polignac number, because 203111034431123 - 2² = 203111034431119 is a prime.

It is a super-2 number, since 2×203111034431123² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (203111034031123) 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, 11654543 + ... + 23281976.

It is an arithmetic number, because the mean of its divisors is an integer number (8085009458400).

Almost surely, 2^{203111034431123} is an apocalyptic number.

203111034431123 is a deficient number, since it is larger than the sum of its proper divisors (55609268237677).

203111034431123 is a wasteful number, since it uses less digits than its factorization.

203111034431123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34938771.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 203111034431123 its reverse (321134430111302), we get a palindrome (524245464542425).

The spelling of 203111034431123 in words is "two hundred three trillion, one hundred eleven billion, thirty-four million, four hundred thirty-one thousand, one hundred twenty-three".