212021121331 has 2 divisors, whose sum is σ = 212021121332. Its totient is φ = 212021121330.

The previous prime is 212021121311. The next prime is 212021121343. The reversal of 212021121331 is 133121120212.

212021121331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021121331 is a prime.

It is a super-2 number, since 2×212021121331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212021121299 and 212021121308.

It is not a weakly prime, because it can be changed into another prime (212021121311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010560665 + 106010560666.

It is an arithmetic number, because the mean of its divisors is an integer number (106010560666).

Almost surely, 2^212021121331 is an apocalyptic number.

212021121331 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021121331 is an equidigital number, since it uses as much as digits as its factorization.

212021121331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212021121331 its reverse (133121120212), we get a palindrome (345142241543).

The spelling of 212021121331 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, three hundred thirty-one".