212109046690 has 8 divisors (see below), whose sum is σ = 381796284060. Its totient is φ = 84843618672.

The previous prime is 212109046687. The next prime is 212109046717. The reversal of 212109046690 is 96640901212.

212109046690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 206785739169 + 5323307521 = 454737^2 + 72961^2 .

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

It is a super-2 number, since 2×212109046690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10605452325 + ... + 10605452344.

Almost surely, 2^212109046690 is an apocalyptic number.

212109046690 is a deficient number, since it is larger than the sum of its proper divisors (169687237370).

212109046690 is a wasteful number, since it uses less digits than its factorization.

212109046690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21210904676.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 212109046690 in words is "two hundred twelve billion, one hundred nine million, forty-six thousand, six hundred ninety".