212130121009 has 8 divisors (see below), whose sum is σ = 223303003040. Its totient is φ = 200958052896.

The previous prime is 212130121001. The next prime is 212130121013. The reversal of 212130121009 is 900121031212.

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 212130121009 - 2³ = 212130121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212130121001) 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, 373477 + ... + 750829.

It is an arithmetic number, because the mean of its divisors is an integer number (27912875380).

Almost surely, 2^212130121009 is an apocalyptic number.

It is an amenable number.

212130121009 is a deficient number, since it is larger than the sum of its proper divisors (11172882031).

212130121009 is a wasteful number, since it uses less digits than its factorization.

212130121009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406959.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 212130121009 in words is "two hundred twelve billion, one hundred thirty million, one hundred twenty-one thousand, nine".