21213233322031 has 2 divisors, whose sum is σ = 21213233322032. Its totient is φ = 21213233322030.

The previous prime is 21213233321923. The next prime is 21213233322059. The reversal of 21213233322031 is 13022333231212.

It is a happy number.

It is an a-pointer prime, because the next prime (21213233322059) can be obtained adding 21213233322031 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21213233322031 - 2¹¹ = 21213233319983 is a prime.

It is a super-2 number, since 2×21213233322031² (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 (21213233322091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606616661015 + 10606616661016.

It is an arithmetic number, because the mean of its divisors is an integer number (10606616661016).

Almost surely, 2^{21213233322031} is an apocalyptic number.

21213233322031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213233322031 is an equidigital number, since it uses as much as digits as its factorization.

21213233322031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21213233322031 its reverse (13022333231212), we get a palindrome (34235566553243).

The spelling of 21213233322031 in words is "twenty-one trillion, two hundred thirteen billion, two hundred thirty-three million, three hundred twenty-two thousand, thirty-one".