212125707 has 6 divisors (see below), whose sum is σ = 306403812. Its totient is φ = 141417132.

The previous prime is 212125703. The next prime is 212125717. The reversal of 212125707 is 707521212.

It is not a de Polignac number, because 212125707 - 2² = 212125703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212125703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11784753 + ... + 11784770.

It is an arithmetic number, because the mean of its divisors is an integer number (51067302).

Almost surely, 2^212125707 is an apocalyptic number.

212125707 is a deficient number, since it is larger than the sum of its proper divisors (94278105).

212125707 is a wasteful number, since it uses less digits than its factorization.

212125707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23569529 (or 23569526 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 212125707 is about 14564.5359349346. The cubic root of 212125707 is about 596.3910273849.

Adding to 212125707 its reverse (707521212), we get a palindrome (919646919).

The spelling of 212125707 in words is "two hundred twelve million, one hundred twenty-five thousand, seven hundred seven".