212120411 has 2 divisors, whose sum is σ = 212120412. Its totient is φ = 212120410.

The previous prime is 212120401. The next prime is 212120443. The reversal of 212120411 is 114021212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212120411 is a prime.

It is not a weakly prime, because it can be changed into another prime (212120401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060205 + 106060206.

It is an arithmetic number, because the mean of its divisors is an integer number (106060206).

Almost surely, 2^212120411 is an apocalyptic number.

212120411 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120411 is an equidigital number, since it uses as much as digits as its factorization.

212120411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 212120411 is about 14564.3541223083. The cubic root of 212120411 is about 596.3860641123.

Adding to 212120411 its reverse (114021212), we get a palindrome (326141623).

The spelling of 212120411 in words is "two hundred twelve million, one hundred twenty thousand, four hundred eleven".