21011042140351 has 2 divisors, whose sum is σ = 21011042140352. Its totient is φ = 21011042140350.

The previous prime is 21011042140261. The next prime is 21011042140357. The reversal of 21011042140351 is 15304124011012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011042140351 - 2²⁷ = 21010907922623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011042140357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505521070175 + 10505521070176.

It is an arithmetic number, because the mean of its divisors is an integer number (10505521070176).

Almost surely, 2^{21011042140351} is an apocalyptic number.

21011042140351 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011042140351 is an equidigital number, since it uses as much as digits as its factorization.

21011042140351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 21011042140351 its reverse (15304124011012), we get a palindrome (36315166151363).

The spelling of 21011042140351 in words is "twenty-one trillion, eleven billion, forty-two million, one hundred forty thousand, three hundred fifty-one".