1242151113 has 48 divisors (see below), whose sum is σ = 1994185856. Its totient is φ = 673505280.

The previous prime is 1242151093. The next prime is 1242151139. The reversal of 1242151113 is 3111512421.

It is not a de Polignac number, because 1242151113 - 2⁵ = 1242151081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242151113.

It is not an unprimeable number, because it can be changed into a prime (1242151153) 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 in 47 ways as a sum of consecutive naturals, for example, 1076745 + ... + 1077897.

Almost surely, 2^1242151113 is an apocalyptic number.

It is an amenable number.

1242151113 is a deficient number, since it is larger than the sum of its proper divisors (752034743).

1242151113 is a wasteful number, since it uses less digits than its factorization.

1242151113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1253 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 1242151113 is about 35244.1642403391. The cubic root of 1242151113 is about 1074.9579541514.

Adding to 1242151113 its reverse (3111512421), we get a palindrome (4353663534).

The spelling of 1242151113 in words is "one billion, two hundred forty-two million, one hundred fifty-one thousand, one hundred thirteen".