721001052249 has 4 divisors (see below), whose sum is σ = 961334736336. Its totient is φ = 480667368164.

The previous prime is 721001052227. The next prime is 721001052253. The reversal of 721001052249 is 942250100127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 721001052249 - 2⁸ = 721001051993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (721001052209) 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, 120166842039 + ... + 120166842044.

It is an arithmetic number, because the mean of its divisors is an integer number (240333684084).

Almost surely, 2^721001052249 is an apocalyptic number.

It is an amenable number.

721001052249 is a deficient number, since it is larger than the sum of its proper divisors (240333684087).

721001052249 is a wasteful number, since it uses less digits than its factorization.

721001052249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240333684086.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 721001052249 in words is "seven hundred twenty-one billion, one million, fifty-two thousand, two hundred forty-nine".