1231501302103 has 2 divisors, whose sum is σ = 1231501302104. Its totient is φ = 1231501302102.

The previous prime is 1231501302049. The next prime is 1231501302107. The reversal of 1231501302103 is 3012031051321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231501302103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231501302107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615750651051 + 615750651052.

It is an arithmetic number, because the mean of its divisors is an integer number (615750651052).

Almost surely, 2^{1231501302103} is an apocalyptic number.

1231501302103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231501302103 is an equidigital number, since it uses as much as digits as its factorization.

1231501302103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 1231501302103 its reverse (3012031051321), we get a palindrome (4243532353424).

The spelling of 1231501302103 in words is "one trillion, two hundred thirty-one billion, five hundred one million, three hundred two thousand, one hundred three".