721201227284 has 12 divisors (see below), whose sum is σ = 1262136708084. Its totient is φ = 360590739264.

The previous prime is 721201227269. The next prime is 721201227287. The reversal of 721201227284 is 482722102127.

It can be written as a sum of positive squares in 2 ways, for example, as 339746762884 + 381454464400 = 582878^2 + 617620^2 .

It is a super-3 number, since 3×721201227284³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721201227287) 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, 2303027 + ... + 2597370.

It is an arithmetic number, because the mean of its divisors is an integer number (105178059007).

Almost surely, 2^721201227284 is an apocalyptic number.

It is an amenable number.

721201227284 is a deficient number, since it is larger than the sum of its proper divisors (540935480800).

721201227284 is a wasteful number, since it uses less digits than its factorization.

721201227284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4937194 (or 4937192 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The spelling of 721201227284 in words is "seven hundred twenty-one billion, two hundred one million, two hundred twenty-seven thousand, two hundred eighty-four".