115243203511021 has 4 divisors (see below), whose sum is σ = 115266312239392. Its totient is φ = 115220094782652.

The previous prime is 115243203511019. The next prime is 115243203511039. The reversal of 115243203511021 is 120115302342511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115243203511021 - 2¹ = 115243203511019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115243203518021) 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, 11554356705 + ... + 11554366678.

It is an arithmetic number, because the mean of its divisors is an integer number (28816578059848).

Almost surely, 2^{115243203511021} is an apocalyptic number.

It is an amenable number.

115243203511021 is a deficient number, since it is larger than the sum of its proper divisors (23108728371).

115243203511021 is an equidigital number, since it uses as much as digits as its factorization.

115243203511021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23108728370.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 115243203511021 its reverse (120115302342511), we get a palindrome (235358505853532).

The spelling of 115243203511021 in words is "one hundred fifteen trillion, two hundred forty-three billion, two hundred three million, five hundred eleven thousand, twenty-one".