203311211312111 has 16 divisors (see below), whose sum is σ = 233375696523840. Its totient is φ = 173501767756800.

The previous prime is 203311211312093. The next prime is 203311211312141. The reversal of 203311211312111 is 111213112113302.

It is not a de Polignac number, because 203311211312111 - 2¹⁸ = 203311211049967 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 (203311211312141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69255935 + ... + 72131871.

It is an arithmetic number, because the mean of its divisors is an integer number (14585981032740).

Almost surely, 2^{203311211312111} is an apocalyptic number.

203311211312111 is a deficient number, since it is larger than the sum of its proper divisors (30064485211729).

203311211312111 is a wasteful number, since it uses less digits than its factorization.

203311211312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920274.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 203311211312111 its reverse (111213112113302), we get a palindrome (314524323425413).

The spelling of 203311211312111 in words is "two hundred three trillion, three hundred eleven billion, two hundred eleven million, three hundred twelve thousand, one hundred eleven".