1242311013 has 24 divisors (see below), whose sum is σ = 1872820768. Its totient is φ = 822906864.

The previous prime is 1242311011. The next prime is 1242311017. The reversal of 1242311013 is 3101132421.

It is not a de Polignac number, because 1242311013 - 2¹ = 1242311011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242311011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21870 + ... + 54432.

Almost surely, 2^1242311013 is an apocalyptic number.

It is an amenable number.

1242311013 is a deficient number, since it is larger than the sum of its proper divisors (630509755).

1242311013 is an equidigital number, since it uses as much as digits as its factorization.

1242311013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32735 (or 32723 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1242311013 is about 35246.4326279980. The cubic root of 1242311013 is about 1075.0040780087.

Adding to 1242311013 its reverse (3101132421), we get a palindrome (4343443434).

It can be divided in two parts, 12423 and 11013, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 1242311013 in words is "one billion, two hundred forty-two million, three hundred eleven thousand, thirteen".