13331221161077 has 2 divisors, whose sum is σ = 13331221161078. Its totient is φ = 13331221161076.

The previous prime is 13331221161029. The next prime is 13331221161091. The reversal of 13331221161077 is 77016112213331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11561999286436 + 1769221874641 = 3400294^2 + 1330121^2 .

It is a cyclic number.

It is not a de Polignac number, because 13331221161077 - 2¹⁴ = 13331221144693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13331221161077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331221161277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665610580538 + 6665610580539.

It is an arithmetic number, because the mean of its divisors is an integer number (6665610580539).

Almost surely, 2^{13331221161077} is an apocalyptic number.

It is an amenable number.

13331221161077 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331221161077 is an equidigital number, since it uses as much as digits as its factorization.

13331221161077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 13331221161077 in words is "thirteen trillion, three hundred thirty-one billion, two hundred twenty-one million, one hundred sixty-one thousand, seventy-seven".