1182277777321 has 2 divisors, whose sum is σ = 1182277777322. Its totient is φ = 1182277777320.

The previous prime is 1182277777273. The next prime is 1182277777361. The reversal of 1182277777321 is 1237777722811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020223223721 + 162054553600 = 1010061^2 + 402560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1182277777321 is a prime.

It is a super-5 number, since 5×1182277777321⁵ (a number of 62 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (1182277777361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591138888660 + 591138888661.

It is an arithmetic number, because the mean of its divisors is an integer number (591138888661).

Almost surely, 2^{1182277777321} is an apocalyptic number.

It is an amenable number.

1182277777321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1182277777321 is an equidigital number, since it uses as much as digits as its factorization.

1182277777321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3226944, while the sum is 55.

The spelling of 1182277777321 in words is "one trillion, one hundred eighty-two billion, two hundred seventy-seven million, seven hundred seventy-seven thousand, three hundred twenty-one".