1213012523 has 2 divisors, whose sum is σ = 1213012524. Its totient is φ = 1213012522.

The previous prime is 1213012517. The next prime is 1213012561. The reversal of 1213012523 is 3252103121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213012523 - 2¹⁸ = 1212750379 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213012495 and 1213012504.

It is not a weakly prime, because it can be changed into another prime (1213012513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606506261 + 606506262.

It is an arithmetic number, because the mean of its divisors is an integer number (606506262).

Almost surely, 2^1213012523 is an apocalyptic number.

1213012523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213012523 is an equidigital number, since it uses as much as digits as its factorization.

1213012523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1213012523 is about 34828.3293168076. The cubic root of 1213012523 is about 1066.4858430569.

Adding to 1213012523 its reverse (3252103121), we get a palindrome (4465115644).

The spelling of 1213012523 in words is "one billion, two hundred thirteen million, twelve thousand, five hundred twenty-three".