211201221012021 has 24 divisors (see below), whose sum is σ = 323420410919424. Its totient is φ = 132576180576480.

The previous prime is 211201221011999. The next prime is 211201221012107. The reversal of 211201221012021 is 120210122102112.

211201221012021 is a `hidden beast` number, since 211 + 201 + 2 + 210 + 1 + 20 + 21 = 666.

It is not a de Polignac number, because 211201221012021 - 2⁹ = 211201221011509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211201221011985 and 211201221012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201221012521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10229633241 + ... + 10229653886.

It is an arithmetic number, because the mean of its divisors is an integer number (13475850454976).

Almost surely, 2^{211201221012021} is an apocalyptic number.

It is an amenable number.

211201221012021 is a deficient number, since it is larger than the sum of its proper divisors (112219189907403).

211201221012021 is a wasteful number, since it uses less digits than its factorization.

211201221012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20459287201 (or 20459287198 counting only the distinct ones).

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

Adding to 211201221012021 its reverse (120210122102112), we get a palindrome (331411343114133).

The spelling of 211201221012021 in words is "two hundred eleven trillion, two hundred one billion, two hundred twenty-one million, twelve thousand, twenty-one".