21103011331063 has 2 divisors, whose sum is σ = 21103011331064. Its totient is φ = 21103011331062.

The previous prime is 21103011331001. The next prime is 21103011331099. The reversal of 21103011331063 is 36013311030112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21103011331063 - 2⁹ = 21103011330551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103711331063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551505665531 + 10551505665532.

It is an arithmetic number, because the mean of its divisors is an integer number (10551505665532).

Almost surely, 2^{21103011331063} is an apocalyptic number.

21103011331063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103011331063 is an equidigital number, since it uses as much as digits as its factorization.

21103011331063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 21103011331063 its reverse (36013311030112), we get a palindrome (57116322361175).

The spelling of 21103011331063 in words is "twenty-one trillion, one hundred three billion, eleven million, three hundred thirty-one thousand, sixty-three".