212021121999999 has 12 divisors (see below), whose sum is σ = 306113335906056. Its totient is φ = 130474536615072.

The previous prime is 212021121999971. The next prime is 212021122000001. The reversal of 212021121999999 is 999999121120212.

It is not a de Polignac number, because 212021121999999 - 2⁷ = 212021121999871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021121999949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209093808172 + ... + 209093809185.

It is an arithmetic number, because the mean of its divisors is an integer number (25509444658838).

Almost surely, 2^{212021121999999} is an apocalyptic number.

212021121999999 is a deficient number, since it is larger than the sum of its proper divisors (94092213906057).

212021121999999 is a wasteful number, since it uses less digits than its factorization.

212021121999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418187617386 (or 418187617373 counting only the distinct ones).

The product of its (nonzero) digits is 8503056, while the sum is 66.

The spelling of 212021121999999 in words is "two hundred twelve trillion, twenty-one billion, one hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".