203311232121013 has 2 divisors, whose sum is σ = 203311232121014. Its totient is φ = 203311232121012.

The previous prime is 203311232120993. The next prime is 203311232121059. The reversal of 203311232121013 is 310121232113302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144187789183684 + 59123442937329 = 12007822^2 + 7689177^2 .

It is a cyclic number.

It is not a de Polignac number, because 203311232121013 - 2⁵ = 203311232120981 is a prime.

It is a super-2 number, since 2×203311232121013² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203311232121913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101655616060506 + 101655616060507.

It is an arithmetic number, because the mean of its divisors is an integer number (101655616060507).

Almost surely, 2^{203311232121013} is an apocalyptic number.

It is an amenable number.

203311232121013 is a deficient number, since it is larger than the sum of its proper divisors (1).

203311232121013 is an equidigital number, since it uses as much as digits as its factorization.

203311232121013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 203311232121013 its reverse (310121232113302), we get a palindrome (513432464234315).

The spelling of 203311232121013 in words is "two hundred three trillion, three hundred eleven billion, two hundred thirty-two million, one hundred twenty-one thousand, thirteen".