7121424242 has 4 divisors (see below), whose sum is σ = 10682136366. Its totient is φ = 3560712120.

The previous prime is 7121424221. The next prime is 7121424259. The reversal of 7121424242 is 2424241217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2424241217 = 19 ⋅127591643.

It can be written as a sum of positive squares in only one way, i.e., 6595226521 + 526197721 = 81211^2 + 22939^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780356059 + ... + 1780356062.

Almost surely, 2^7121424242 is an apocalyptic number.

7121424242 is a deficient number, since it is larger than the sum of its proper divisors (3560712124).

7121424242 is a wasteful number, since it uses less digits than its factorization.

7121424242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560712123.

The product of its digits is 7168, while the sum is 29.

The square root of 7121424242 is about 84388.5314601457. The cubic root of 7121424242 is about 1923.9286098153.

Adding to 7121424242 its reverse (2424241217), we get a palindrome (9545665459).

The spelling of 7121424242 in words is "seven billion, one hundred twenty-one million, four hundred twenty-four thousand, two hundred forty-two".