212113109 has 8 divisors (see below), whose sum is σ = 233742432. Its totient is φ = 191242800.

The previous prime is 212113081. The next prime is 212113117. The reversal of 212113109 is 901311212.

212113109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212113109 - 2²⁰ = 211064533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212113189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189167 + ... + 190284.

It is an arithmetic number, because the mean of its divisors is an integer number (29217804).

Almost surely, 2^212113109 is an apocalyptic number.

It is an amenable number.

212113109 is a deficient number, since it is larger than the sum of its proper divisors (21629323).

212113109 is a wasteful number, since it uses less digits than its factorization.

212113109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379507.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 212113109 is about 14564.1034396217. The cubic root of 212113109 is about 596.3792207334.

The spelling of 212113109 in words is "two hundred twelve million, one hundred thirteen thousand, one hundred nine".