212124131 has 2 divisors, whose sum is σ = 212124132. Its totient is φ = 212124130.

The previous prime is 212124127. The next prime is 212124149. The reversal of 212124131 is 131421212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212124131 - 2² = 212124127 is a prime.

It is a super-2 number, since 2×212124131² = 89993293905010322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212124191) 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, 106062065 + 106062066.

It is an arithmetic number, because the mean of its divisors is an integer number (106062066).

Almost surely, 2^212124131 is an apocalyptic number.

212124131 is a deficient number, since it is larger than the sum of its proper divisors (1).

212124131 is an equidigital number, since it uses as much as digits as its factorization.

212124131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 212124131 is about 14564.4818308102. The cubic root of 212124131 is about 596.3895504076.

Adding to 212124131 its reverse (131421212), we get a palindrome (343545343).

The spelling of 212124131 in words is "two hundred twelve million, one hundred twenty-four thousand, one hundred thirty-one".