115211412122021 has 2 divisors, whose sum is σ = 115211412122022. Its totient is φ = 115211412122020.

The previous prime is 115211412121933. The next prime is 115211412122083. The reversal of 115211412122021 is 120221214112511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106868268719521 + 8343143402500 = 10337711^2 + 2888450^2 .

It is a cyclic number.

It is not a de Polignac number, because 115211412122021 - 2²² = 115211407927717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115211412122321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57605706061010 + 57605706061011.

It is an arithmetic number, because the mean of its divisors is an integer number (57605706061011).

Almost surely, 2^{115211412122021} is an apocalyptic number.

It is an amenable number.

115211412122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

115211412122021 is an equidigital number, since it uses as much as digits as its factorization.

115211412122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 26.

Adding to 115211412122021 its reverse (120221214112511), we get a palindrome (235432626234532).

The spelling of 115211412122021 in words is "one hundred fifteen trillion, two hundred eleven billion, four hundred twelve million, one hundred twenty-two thousand, twenty-one".