21321110703131 has 2 divisors, whose sum is σ = 21321110703132. Its totient is φ = 21321110703130.

The previous prime is 21321110703119. The next prime is 21321110703169. The reversal of 21321110703131 is 13130701112312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321110703131 - 2²⁶ = 21321043594267 is a prime.

It is a super-2 number, since 2×21321110703131² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21321110703131.

It is not a weakly prime, because it can be changed into another prime (21321110703181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660555351565 + 10660555351566.

It is an arithmetic number, because the mean of its divisors is an integer number (10660555351566).

Almost surely, 2^{21321110703131} is an apocalyptic number.

21321110703131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321110703131 is an equidigital number, since it uses as much as digits as its factorization.

21321110703131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

Adding to 21321110703131 its reverse (13130701112312), we get a palindrome (34451811815443).

The spelling of 21321110703131 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred ten million, seven hundred three thousand, one hundred thirty-one".