72201212231 has 2 divisors, whose sum is σ = 72201212232. Its totient is φ = 72201212230.

The previous prime is 72201212221. The next prime is 72201212263. The reversal of 72201212231 is 13221210227.

It is a weak prime.

It is an emirp because it is prime and its reverse (13221210227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72201212231 - 2²² = 72197017927 is a prime.

It is a super-2 number, since 2×72201212231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72201212197 and 72201212206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72201212201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36100606115 + 36100606116.

It is an arithmetic number, because the mean of its divisors is an integer number (36100606116).

Almost surely, 2^72201212231 is an apocalyptic number.

72201212231 is a deficient number, since it is larger than the sum of its proper divisors (1).

72201212231 is an equidigital number, since it uses as much as digits as its factorization.

72201212231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 72201212231 its reverse (13221210227), we get a palindrome (85422422458).

The spelling of 72201212231 in words is "seventy-two billion, two hundred one million, two hundred twelve thousand, two hundred thirty-one".