203311313030121 has 4 divisors (see below), whose sum is σ = 271081750706832. Its totient is φ = 135540875353412.

The previous prime is 203311313030093. The next prime is 203311313030123. The reversal of 203311313030121 is 121030313113302.

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 203311313030121 - 2¹⁴ = 203311313013737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 203311313030091 and 203311313030100.

It is not an unprimeable number, because it can be changed into a prime (203311313030123) 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, 33885218838351 + ... + 33885218838356.

It is an arithmetic number, because the mean of its divisors is an integer number (67770437676708).

Almost surely, 2^{203311313030121} is an apocalyptic number.

It is an amenable number.

203311313030121 is a deficient number, since it is larger than the sum of its proper divisors (67770437676711).

203311313030121 is an equidigital number, since it uses as much as digits as its factorization.

203311313030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67770437676710.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 203311313030121 its reverse (121030313113302), we get a palindrome (324341626143423).

The spelling of 203311313030121 in words is "two hundred three trillion, three hundred eleven billion, three hundred thirteen million, thirty thousand, one hundred twenty-one".