212001331 has 2 divisors, whose sum is σ = 212001332. Its totient is φ = 212001330.

The previous prime is 212001313. The next prime is 212001359. The reversal of 212001331 is 133100212.

Together with previous prime (212001313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212001331 - 2¹⁹ = 211477043 is a prime.

It is a super-2 number, since 2×212001331² = 89889128691543122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212001311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000665 + 106000666.

It is an arithmetic number, because the mean of its divisors is an integer number (106000666).

Almost surely, 2^212001331 is an apocalyptic number.

212001331 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001331 is an equidigital number, since it uses as much as digits as its factorization.

212001331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 212001331 is about 14560.2654852170. The cubic root of 212001331 is about 596.2744436328.

Adding to 212001331 its reverse (133100212), we get a palindrome (345101543).

The spelling of 212001331 in words is "two hundred twelve million, one thousand, three hundred thirty-one".