721201227269 has 2 divisors, whose sum is σ = 721201227270. Its totient is φ = 721201227268.

The previous prime is 721201227239. The next prime is 721201227287. The reversal of 721201227269 is 962722102127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 368252358244 + 352948869025 = 606838^2 + 594095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721201227269 is a prime.

It is a super-2 number, since 2×721201227269² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721201227239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360600613634 + 360600613635.

It is an arithmetic number, because the mean of its divisors is an integer number (360600613635).

Almost surely, 2^721201227269 is an apocalyptic number.

It is an amenable number.

721201227269 is a deficient number, since it is larger than the sum of its proper divisors (1).

721201227269 is an equidigital number, since it uses as much as digits as its factorization.

721201227269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 721201227269 in words is "seven hundred twenty-one billion, two hundred one million, two hundred twenty-seven thousand, two hundred sixty-nine".