115211211403021 has 2 divisors, whose sum is σ = 115211211403022. Its totient is φ = 115211211403020.

The previous prime is 115211211402997. The next prime is 115211211403069. The reversal of 115211211403021 is 120304112112511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101222010637225 + 13989200765796 = 10060915^2 + 3740214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115211211403021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115211211403091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57605605701510 + 57605605701511.

It is an arithmetic number, because the mean of its divisors is an integer number (57605605701511).

Almost surely, 2^{115211211403021} is an apocalyptic number.

It is an amenable number.

115211211403021 is a deficient number, since it is larger than the sum of its proper divisors (1).

115211211403021 is an equidigital number, since it uses as much as digits as its factorization.

115211211403021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 25.

Adding to 115211211403021 its reverse (120304112112511), we get a palindrome (235515323515532).

The spelling of 115211211403021 in words is "one hundred fifteen trillion, two hundred eleven billion, two hundred eleven million, four hundred three thousand, twenty-one".