212021020121211 has 24 divisors (see below), whose sum is σ = 354797514870240. Its totient is φ = 119495212903296.

The previous prime is 212021020121173. The next prime is 212021020121243. The reversal of 212021020121211 is 112121020120212.

212021020121211 is a `hidden beast` number, since 2 + 1 + 20 + 210 + 201 + 21 + 211 = 666.

It is not a de Polignac number, because 212021020121211 - 2¹⁵ = 212021020088443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212021020121711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23050769496 + ... + 23050778693.

It is an arithmetic number, because the mean of its divisors is an integer number (14783229786260).

Almost surely, 2^{212021020121211} is an apocalyptic number.

212021020121211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212021020121211 is a deficient number, since it is larger than the sum of its proper divisors (142776494749029).

212021020121211 is a wasteful number, since it uses less digits than its factorization.

212021020121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46101548275 (or 46101548272 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212021020121211 its reverse (112121020120212), we get a palindrome (324142040241423).

Subtracting from 212021020121211 its reverse (112121020120212), we obtain a palindrome (99900000000999).

The spelling of 212021020121211 in words is "two hundred twelve trillion, twenty-one billion, twenty million, one hundred twenty-one thousand, two hundred eleven".