212120873 has 2 divisors, whose sum is σ = 212120874. Its totient is φ = 212120872.

The previous prime is 212120863. The next prime is 212120911. The reversal of 212120873 is 378021212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196336144 + 15784729 = 14012^2 + 3973^2 .

It is a cyclic number.

It is not a de Polignac number, because 212120873 - 2¹² = 212116777 is a prime.

It is a super-3 number, since 3×212120873³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (212120813) 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, 106060436 + 106060437.

It is an arithmetic number, because the mean of its divisors is an integer number (106060437).

Almost surely, 2^212120873 is an apocalyptic number.

It is an amenable number.

212120873 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120873 is an equidigital number, since it uses as much as digits as its factorization.

212120873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 212120873 is about 14564.3699829412. The cubic root of 212120873 is about 596.3864970899.

The spelling of 212120873 in words is "two hundred twelve million, one hundred twenty thousand, eight hundred seventy-three".