1203312312157 has 2 divisors, whose sum is σ = 1203312312158. Its totient is φ = 1203312312156.

The previous prime is 1203312312143. The next prime is 1203312312239. The reversal of 1203312312157 is 7512132133021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1186326142596 + 16986169561 = 1089186^2 + 130331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203312312157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203312312457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601656156078 + 601656156079.

It is an arithmetic number, because the mean of its divisors is an integer number (601656156079).

Almost surely, 2^{1203312312157} is an apocalyptic number.

It is an amenable number.

1203312312157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203312312157 is an equidigital number, since it uses as much as digits as its factorization.

1203312312157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 1203312312157 its reverse (7512132133021), we get a palindrome (8715444445178).

The spelling of 1203312312157 in words is "one trillion, two hundred three billion, three hundred twelve million, three hundred twelve thousand, one hundred fifty-seven".