115477707311221 has 2 divisors, whose sum is σ = 115477707311222. Its totient is φ = 115477707311220.

The previous prime is 115477707311147. The next prime is 115477707311243. The reversal of 115477707311221 is 122113707774511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106247133140625 + 9230574170596 = 10307625^2 + 3038186^2 .

It is a cyclic number.

It is not a de Polignac number, because 115477707311221 - 2²³ = 115477698922613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115477707311821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57738853655610 + 57738853655611.

It is an arithmetic number, because the mean of its divisors is an integer number (57738853655611).

Almost surely, 2^{115477707311221} is an apocalyptic number.

It is an amenable number.

115477707311221 is a deficient number, since it is larger than the sum of its proper divisors (1).

115477707311221 is an equidigital number, since it uses as much as digits as its factorization.

115477707311221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576240, while the sum is 49.

The spelling of 115477707311221 in words is "one hundred fifteen trillion, four hundred seventy-seven billion, seven hundred seven million, three hundred eleven thousand, two hundred twenty-one".