721452540532211 has 4 divisors (see below), whose sum is σ = 721918294272000. Its totient is φ = 720986786792424.

The previous prime is 721452540532177. The next prime is 721452540532267. The reversal of 721452540532211 is 112235045254127.

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

It is a cyclic number.

It is not a de Polignac number, because 721452540532211 - 2¹⁴ = 721452540515827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721452540532511) 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, 232876867571 + ... + 232876870668.

It is an arithmetic number, because the mean of its divisors is an integer number (180479573568000).

Almost surely, 2^{721452540532211} is an apocalyptic number.

721452540532211 is a deficient number, since it is larger than the sum of its proper divisors (465753739789).

721452540532211 is a wasteful number, since it uses less digits than its factorization.

721452540532211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465753739788.

The product of its (nonzero) digits is 672000, while the sum is 44.

Adding to 721452540532211 its reverse (112235045254127), we get a palindrome (833687585786338).

The spelling of 721452540532211 in words is "seven hundred twenty-one trillion, four hundred fifty-two billion, five hundred forty million, five hundred thirty-two thousand, two hundred eleven".