1322215145261 has 2 divisors, whose sum is σ = 1322215145262. Its totient is φ = 1322215145260.

The previous prime is 1322215145243. The next prime is 1322215145281. The reversal of 1322215145261 is 1625415122231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690477902500 + 631737242761 = 830950^2 + 794819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1322215145261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1322215145281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661107572630 + 661107572631.

It is an arithmetic number, because the mean of its divisors is an integer number (661107572631).

Almost surely, 2^{1322215145261} is an apocalyptic number.

It is an amenable number.

1322215145261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322215145261 is an equidigital number, since it uses as much as digits as its factorization.

1322215145261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 35.

The spelling of 1322215145261 in words is "one trillion, three hundred twenty-two billion, two hundred fifteen million, one hundred forty-five thousand, two hundred sixty-one".