21013233322031 has 2 divisors, whose sum is σ = 21013233322032. Its totient is φ = 21013233322030.

The previous prime is 21013233322019. The next prime is 21013233322049. The reversal of 21013233322031 is 13022333231012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21013233322031 - 2¹⁰ = 21013233321007 is a prime.

It is a super-2 number, since 2×21013233322031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013233322061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506616661015 + 10506616661016.

It is an arithmetic number, because the mean of its divisors is an integer number (10506616661016).

Almost surely, 2^{21013233322031} is an apocalyptic number.

21013233322031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013233322031 is an equidigital number, since it uses as much as digits as its factorization.

21013233322031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21013233322031 its reverse (13022333231012), we get a palindrome (34035566553043).

The spelling of 21013233322031 in words is "twenty-one trillion, thirteen billion, two hundred thirty-three million, three hundred twenty-two thousand, thirty-one".