115040234121221 has 4 divisors (see below), whose sum is σ = 115040415098700. Its totient is φ = 115040053143744.

The previous prime is 115040234121203. The next prime is 115040234121277. The reversal of 115040234121221 is 122121432040511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42142960881121 + 72897273240100 = 6491761^2 + 8537990^2 .

It is a cyclic number.

It is not a de Polignac number, because 115040234121221 - 2⁴² = 110642187610117 is a prime.

It is a super-2 number, since 2×115040234121221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115040234121721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89531876 + ... + 90807693.

It is an arithmetic number, because the mean of its divisors is an integer number (28760103774675).

Almost surely, 2^{115040234121221} is an apocalyptic number.

It is an amenable number.

115040234121221 is a deficient number, since it is larger than the sum of its proper divisors (180977479).

115040234121221 is an equidigital number, since it uses as much as digits as its factorization.

115040234121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180977478.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 115040234121221 its reverse (122121432040511), we get a palindrome (237161666161732).

The spelling of 115040234121221 in words is "one hundred fifteen trillion, forty billion, two hundred thirty-four million, one hundred twenty-one thousand, two hundred twenty-one".