126313645346221 has 2 divisors, whose sum is σ = 126313645346222. Its totient is φ = 126313645346220.

The previous prime is 126313645346191. The next prime is 126313645346267. The reversal of 126313645346221 is 122643546313621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117737386670596 + 8576258675625 = 10850686^2 + 2928525^2 .

It is a cyclic number.

It is not a de Polignac number, because 126313645346221 - 2⁷ = 126313645346093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126313645346521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63156822673110 + 63156822673111.

It is an arithmetic number, because the mean of its divisors is an integer number (63156822673111).

Almost surely, 2^{126313645346221} is an apocalyptic number.

It is an amenable number.

126313645346221 is a deficient number, since it is larger than the sum of its proper divisors (1).

126313645346221 is an equidigital number, since it uses as much as digits as its factorization.

126313645346221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 49.

The spelling of 126313645346221 in words is "one hundred twenty-six trillion, three hundred thirteen billion, six hundred forty-five million, three hundred forty-six thousand, two hundred twenty-one".