212113307 has 6 divisors (see below), whose sum is σ = 246744108. Its totient is φ = 181811364.

The previous prime is 212113247. The next prime is 212113309. The reversal of 212113307 is 703311212.

It is not a de Polignac number, because 212113307 - 2⁶ = 212113243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212113309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2164373 + ... + 2164470.

It is an arithmetic number, because the mean of its divisors is an integer number (41124018).

Almost surely, 2^212113307 is an apocalyptic number.

212113307 is a deficient number, since it is larger than the sum of its proper divisors (34630801).

212113307 is an equidigital number, since it uses as much as digits as its factorization.

212113307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328857 (or 4328850 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 212113307 is about 14564.1102371549. The cubic root of 212113307 is about 596.3794062996.

Adding to 212113307 its reverse (703311212), we get a palindrome (915424519).

The spelling of 212113307 in words is "two hundred twelve million, one hundred thirteen thousand, three hundred seven".