212021182009 has 16 divisors (see below), whose sum is σ = 267017736832. Its totient is φ = 163851787008.

The previous prime is 212021182007. The next prime is 212021182019. The reversal of 212021182009 is 900281120212.

It is not a de Polignac number, because 212021182009 - 2¹ = 212021182007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212021182007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27087984 + ... + 27095809.

It is an arithmetic number, because the mean of its divisors is an integer number (16688608552).

Almost surely, 2^212021182009 is an apocalyptic number.

It is an amenable number.

212021182009 is a deficient number, since it is larger than the sum of its proper divisors (54996554823).

212021182009 is a wasteful number, since it uses less digits than its factorization.

212021182009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54183856.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 212021182009 in words is "two hundred twelve billion, twenty-one million, one hundred eighty-two thousand, nine".