21010110121331 has 2 divisors, whose sum is σ = 21010110121332. Its totient is φ = 21010110121330.

The previous prime is 21010110121327. The next prime is 21010110121433. The reversal of 21010110121331 is 13312101101012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010110121331 - 2² = 21010110121327 is a prime.

It is a super-2 number, since 2×21010110121331² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21010110121321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505055060665 + 10505055060666.

It is an arithmetic number, because the mean of its divisors is an integer number (10505055060666).

Almost surely, 2^{21010110121331} is an apocalyptic number.

21010110121331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010110121331 is an equidigital number, since it uses as much as digits as its factorization.

21010110121331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 21010110121331 its reverse (13312101101012), we get a palindrome (34322211222343).

The spelling of 21010110121331 in words is "twenty-one trillion, ten billion, one hundred ten million, one hundred twenty-one thousand, three hundred thirty-one".