212100149 has 4 divisors (see below), whose sum is σ = 212660160. Its totient is φ = 211540140.

The previous prime is 212100139. The next prime is 212100151. The reversal of 212100149 is 941001212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212100149 - 2⁸ = 212099893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212100149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279437 + ... + 280194.

It is an arithmetic number, because the mean of its divisors is an integer number (53165040).

Almost surely, 2^212100149 is an apocalyptic number.

It is an amenable number.

212100149 is a deficient number, since it is larger than the sum of its proper divisors (560011).

212100149 is an equidigital number, since it uses as much as digits as its factorization.

212100149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560010.

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

The square root of 212100149 is about 14563.6585032745. The cubic root of 212100149 is about 596.3670743332.

The spelling of 212100149 in words is "two hundred twelve million, one hundred thousand, one hundred forty-nine".