721201227285 has 128 divisors (see below), whose sum is σ = 1549103616000. Its totient is φ = 277307781120.

The previous prime is 721201227269. The next prime is 721201227287. The reversal of 721201227285 is 582722102127.

It is not a de Polignac number, because 721201227285 - 2⁴ = 721201227269 is a prime.

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 127 ways as a sum of consecutive naturals, for example, 847191 + ... + 1469739.

It is an arithmetic number, because the mean of its divisors is an integer number (12102372000).

Almost surely, 2^721201227285 is an apocalyptic number.

It is an amenable number.

721201227285 is an abundant number, since it is smaller than the sum of its proper divisors (827902388715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721201227285 is a wasteful number, since it uses less digits than its factorization.

721201227285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622651.

The product of its (nonzero) digits is 62720, while the sum is 39.

The spelling of 721201227285 in words is "seven hundred twenty-one billion, two hundred one million, two hundred twenty-seven thousand, two hundred eighty-five".