7221057336242 has 4 divisors (see below), whose sum is σ = 10831586004366. Its totient is φ = 3610528668120.

The previous prime is 7221057336109. The next prime is 7221057336247. The reversal of 7221057336242 is 2426337501227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3803361948841 + 3417695387401 = 1950221^2 + 1848701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7221057336193 and 7221057336202.

It is not an unprimeable number, because it can be changed into a prime (7221057336247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1805264334059 + ... + 1805264334062.

Almost surely, 2^{7221057336242} is an apocalyptic number.

7221057336242 is a deficient number, since it is larger than the sum of its proper divisors (3610528668124).

7221057336242 is a wasteful number, since it uses less digits than its factorization.

7221057336242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610528668123.

The product of its (nonzero) digits is 846720, while the sum is 44.

The spelling of 7221057336242 in words is "seven trillion, two hundred twenty-one billion, fifty-seven million, three hundred thirty-six thousand, two hundred forty-two".