115320404145221 has 16 divisors (see below), whose sum is σ = 133218671459328. Its totient is φ = 98659231641600.

The previous prime is 115320404145197. The next prime is 115320404145227. The reversal of 115320404145221 is 122541404023511.

It is a cyclic number.

It is not a de Polignac number, because 115320404145221 - 2⁶ = 115320404145157 is a prime.

It is a super-2 number, since 2×115320404145221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115320404145227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31487525 + ... + 34958618.

It is an arithmetic number, because the mean of its divisors is an integer number (8326166966208).

Almost surely, 2^{115320404145221} is an apocalyptic number.

115320404145221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115320404145221 is a deficient number, since it is larger than the sum of its proper divisors (17898267314107).

115320404145221 is a wasteful number, since it uses less digits than its factorization.

115320404145221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66455452.

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 115320404145221 its reverse (122541404023511), we get a palindrome (237861808168732).

The spelling of 115320404145221 in words is "one hundred fifteen trillion, three hundred twenty billion, four hundred four million, one hundred forty-five thousand, two hundred twenty-one".