203311133211221 has 24 divisors (see below), whose sum is σ = 238846937862816. Its totient is φ = 172542689481120.

The previous prime is 203311133211217. The next prime is 203311133211227. The reversal of 203311133211221 is 122112331113302.

It is not a de Polignac number, because 203311133211221 - 2² = 203311133211217 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 (203311133211227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1211066 + ... + 20201211.

It is an arithmetic number, because the mean of its divisors is an integer number (9951955744284).

Almost surely, 2^{203311133211221} is an apocalyptic number.

It is an amenable number.

203311133211221 is a deficient number, since it is larger than the sum of its proper divisors (35535804651595).

203311133211221 is a wasteful number, since it uses less digits than its factorization.

203311133211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21414209 (or 21414202 counting only the distinct ones).

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

Adding to 203311133211221 its reverse (122112331113302), we get a palindrome (325423464324523).

The spelling of 203311133211221 in words is "two hundred three trillion, three hundred eleven billion, one hundred thirty-three million, two hundred eleven thousand, two hundred twenty-one".