211221130330031 has 2 divisors, whose sum is σ = 211221130330032. Its totient is φ = 211221130330030.

The previous prime is 211221130330027. The next prime is 211221130330079. The reversal of 211221130330031 is 130033031122112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211221130330031 - 2² = 211221130330027 is a prime.

It is a super-2 number, since 2×211221130330031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221130329979 and 211221130330006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211221130390031) 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, 105610565165015 + 105610565165016.

It is an arithmetic number, because the mean of its divisors is an integer number (105610565165016).

Almost surely, 2^{211221130330031} is an apocalyptic number.

211221130330031 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221130330031 is an equidigital number, since it uses as much as digits as its factorization.

211221130330031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 211221130330031 its reverse (130033031122112), we get a palindrome (341254161452143).

The spelling of 211221130330031 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred thirty million, three hundred thirty thousand, thirty-one".