203120131321 has 2 divisors, whose sum is σ = 203120131322. Its totient is φ = 203120131320.

The previous prime is 203120131273. The next prime is 203120131367. The reversal of 203120131321 is 123131021302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180570604096 + 22549527225 = 424936^2 + 150165^2 .

It is a cyclic number.

It is not a de Polignac number, because 203120131321 - 2⁹ = 203120130809 is a prime.

It is not a weakly prime, because it can be changed into another prime (203120131121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101560065660 + 101560065661.

It is an arithmetic number, because the mean of its divisors is an integer number (101560065661).

Almost surely, 2^203120131321 is an apocalyptic number.

It is an amenable number.

203120131321 is a deficient number, since it is larger than the sum of its proper divisors (1).

203120131321 is an equidigital number, since it uses as much as digits as its factorization.

203120131321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 203120131321 its reverse (123131021302), we get a palindrome (326251152623).

The spelling of 203120131321 in words is "two hundred three billion, one hundred twenty million, one hundred thirty-one thousand, three hundred twenty-one".