203311210311121 has 4 divisors (see below), whose sum is σ = 221794047612144. Its totient is φ = 184828373010100.

The previous prime is 203311210311091. The next prime is 203311210311137. The reversal of 203311210311121 is 121113012113302.

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 a cyclic number.

It is not a de Polignac number, because 203311210311121 - 2¹⁹ = 203311209786833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203311210311092 and 203311210311101.

It is not an unprimeable number, because it can be changed into a prime (203311210311221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9241418650495 + ... + 9241418650516.

It is an arithmetic number, because the mean of its divisors is an integer number (55448511903036).

Almost surely, 2^{203311210311121} is an apocalyptic number.

It is an amenable number.

203311210311121 is a deficient number, since it is larger than the sum of its proper divisors (18482837301023).

203311210311121 is a wasteful number, since it uses less digits than its factorization.

203311210311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18482837301022.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 203311210311121 its reverse (121113012113302), we get a palindrome (324424222424423).

The spelling of 203311210311121 in words is "two hundred three trillion, three hundred eleven billion, two hundred ten million, three hundred eleven thousand, one hundred twenty-one".