212840107 has 2 divisors, whose sum is σ = 212840108. Its totient is φ = 212840106.

The previous prime is 212840083. The next prime is 212840167. The reversal of 212840107 is 701048212.

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-212840107 is a prime.

It is a super-2 number, since 2×212840107² = 90601822295542898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212840167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106420053 + 106420054.

It is an arithmetic number, because the mean of its divisors is an integer number (106420054).

Almost surely, 2^212840107 is an apocalyptic number.

212840107 is a deficient number, since it is larger than the sum of its proper divisors (1).

212840107 is an equidigital number, since it uses as much as digits as its factorization.

212840107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 212840107 is about 14589.0406470062. The cubic root of 212840107 is about 597.0597886113.

Adding to 212840107 its reverse (701048212), we get a palindrome (913888319).

The spelling of 212840107 in words is "two hundred twelve million, eight hundred forty thousand, one hundred seven".