721077122 has 8 divisors (see below), whose sum is σ = 1081761276. Its totient is φ = 360490032.

The previous prime is 721077121. The next prime is 721077139. The reversal of 721077122 is 221770127.

721077122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 710702281 + 10374841 = 26659^2 + 3221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (721077121) 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, 1373 + ... + 38000.

Almost surely, 2^721077122 is an apocalyptic number.

721077122 is a deficient number, since it is larger than the sum of its proper divisors (360684154).

721077122 is a wasteful number, since it uses less digits than its factorization.

721077122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48532.

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 721077122 is about 26852.8792124792. The cubic root of 721077122 is about 896.7276728821.

The spelling of 721077122 in words is "seven hundred twenty-one million, seventy-seven thousand, one hundred twenty-two".