212166101 has 8 divisors (see below), whose sum is σ = 243197760. Its totient is φ = 181315008.

The previous prime is 212166091. The next prime is 212166107. The reversal of 212166101 is 101661212.

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

It is a de Polignac number, because none of the positive numbers 2^k-212166101 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 (212166107) 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, 42611 + ... + 47328.

It is an arithmetic number, because the mean of its divisors is an integer number (30399720).

Almost surely, 2^212166101 is an apocalyptic number.

It is an amenable number.

212166101 is a deficient number, since it is larger than the sum of its proper divisors (31031659).

212166101 is an equidigital number, since it uses as much as digits as its factorization.

212166101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90283.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 212166101 is about 14565.9225935057. The cubic root of 212166101 is about 596.4288808674.

The spelling of 212166101 in words is "two hundred twelve million, one hundred sixty-six thousand, one hundred one".