712636221001 has 4 divisors (see below), whose sum is σ = 712908118404. Its totient is φ = 712364323600.

The previous prime is 712636220987. The next prime is 712636221079. The reversal of 712636221001 is 100122636217.

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

It can be written as a sum of positive squares in 2 ways, for example, as 662067005625 + 50569215376 = 813675^2 + 224876^2 .

It is a cyclic number.

It is not a de Polignac number, because 712636221001 - 2¹⁵ = 712636188233 is a prime.

It is a super-2 number, since 2×712636221001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712636221091) 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, 135944770 + ... + 135950011.

It is an arithmetic number, because the mean of its divisors is an integer number (178227029601).

Almost surely, 2^712636221001 is an apocalyptic number.

It is an amenable number.

712636221001 is a deficient number, since it is larger than the sum of its proper divisors (271897403).

712636221001 is a wasteful number, since it uses less digits than its factorization.

712636221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271897402.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 712636221001 its reverse (100122636217), we get a palindrome (812758857218).

The spelling of 712636221001 in words is "seven hundred twelve billion, six hundred thirty-six million, two hundred twenty-one thousand, one".