203311122331121 has 4 divisors (see below), whose sum is σ = 232355568378432. Its totient is φ = 174266676283812.

The previous prime is 203311122331103. The next prime is 203311122331127. The reversal of 203311122331121 is 121133221113302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 203311122331121 - 2¹⁰ = 203311122330097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203311122331127) 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, 14522223023645 + ... + 14522223023658.

It is an arithmetic number, because the mean of its divisors is an integer number (58088892094608).

Almost surely, 2^{203311122331121} is an apocalyptic number.

It is an amenable number.

203311122331121 is a deficient number, since it is larger than the sum of its proper divisors (29044446047311).

203311122331121 is an equidigital number, since it uses as much as digits as its factorization.

203311122331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29044446047310.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 203311122331121 its reverse (121133221113302), we get a palindrome (324444343444423).

The spelling of 203311122331121 in words is "two hundred three trillion, three hundred eleven billion, one hundred twenty-two million, three hundred thirty-one thousand, one hundred twenty-one".