203141242121 has 2 divisors, whose sum is σ = 203141242122. Its totient is φ = 203141242120.

The previous prime is 203141242103. The next prime is 203141242123. The reversal of 203141242121 is 121242141302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173622222400 + 29519019721 = 416680^2 + 171811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203141242121 is a prime.

Together with 203141242123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (203141242123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101570621060 + 101570621061.

It is an arithmetic number, because the mean of its divisors is an integer number (101570621061).

Almost surely, 2^203141242121 is an apocalyptic number.

It is an amenable number.

203141242121 is a deficient number, since it is larger than the sum of its proper divisors (1).

203141242121 is an equidigital number, since it uses as much as digits as its factorization.

203141242121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 203141242121 its reverse (121242141302), we get a palindrome (324383383423).

The spelling of 203141242121 in words is "two hundred three billion, one hundred forty-one million, two hundred forty-two thousand, one hundred twenty-one".