1242111253013 has 4 divisors (see below), whose sum is σ = 1244227286400. Its totient is φ = 1239995219628.

The previous prime is 1242111253007. The next prime is 1242111253021. The reversal of 1242111253013 is 3103521112421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1242111253013 - 2⁸ = 1242111252757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242111253043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058015813 + ... + 1058016986.

It is an arithmetic number, because the mean of its divisors is an integer number (311056821600).

Almost surely, 2^{1242111253013} is an apocalyptic number.

It is an amenable number.

1242111253013 is a deficient number, since it is larger than the sum of its proper divisors (2116033387).

1242111253013 is an equidigital number, since it uses as much as digits as its factorization.

1242111253013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116033386.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 1242111253013 its reverse (3103521112421), we get a palindrome (4345632365434).

The spelling of 1242111253013 in words is "one trillion, two hundred forty-two billion, one hundred eleven million, two hundred fifty-three thousand, thirteen".