212012210121009 has 16 divisors (see below), whose sum is σ = 285891034852800. Its totient is φ = 139737783570176.

The previous prime is 212012210120999. The next prime is 212012210121017. The reversal of 212012210121009 is 900121012210212.

It is a cyclic number.

It is not a de Polignac number, because 212012210121009 - 2⁷ = 212012210120881 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012210121009.

It is not an unprimeable number, because it can be changed into a prime (212012210121709) 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, 41871819 + ... + 46661264.

It is an arithmetic number, because the mean of its divisors is an integer number (17868189678300).

Almost surely, 2^{212012210121009} is an apocalyptic number.

It is an amenable number.

212012210121009 is a deficient number, since it is larger than the sum of its proper divisors (73878824731791).

212012210121009 is an equidigital number, since it uses as much as digits as its factorization.

212012210121009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88542144.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 212012210121009 in words is "two hundred twelve trillion, twelve billion, two hundred ten million, one hundred twenty-one thousand, nine".