21133303031 has 2 divisors, whose sum is σ = 21133303032. Its totient is φ = 21133303030.

The previous prime is 21133303001. The next prime is 21133303069. The reversal of 21133303031 is 13030333112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21133303031 - 2²⁶ = 21066194167 is a prime.

It is a super-2 number, since 2×21133303031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21133302994 and 21133303012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21133303001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566651515 + 10566651516.

It is an arithmetic number, because the mean of its divisors is an integer number (10566651516).

Almost surely, 2^21133303031 is an apocalyptic number.

21133303031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133303031 is an equidigital number, since it uses as much as digits as its factorization.

21133303031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21133303031 its reverse (13030333112), we get a palindrome (34163636143).

The spelling of 21133303031 in words is "twenty-one billion, one hundred thirty-three million, three hundred three thousand, thirty-one".