201210202221021 has 48 divisors (see below), whose sum is σ = 333952649791488. Its totient is φ = 114355728518400.

The previous prime is 201210202221011. The next prime is 201210202221073. The reversal of 201210202221021 is 120122202012102.

It is a happy number.

201210202221021 is a `hidden beast` number, since 20 + 1 + 210 + 202 + 2 + 210 + 21 = 666.

It is not a de Polignac number, because 201210202221021 - 2⁹ = 201210202220509 is a prime.

It is a super-2 number, since 2×201210202221021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201210202220985 and 201210202221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210202221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69098905 + ... + 71951921.

It is an arithmetic number, because the mean of its divisors is an integer number (6957346870656).

Almost surely, 2^{201210202221021} is an apocalyptic number.

201210202221021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201210202221021 is a deficient number, since it is larger than the sum of its proper divisors (132742447570467).

201210202221021 is a wasteful number, since it uses less digits than its factorization.

201210202221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859082 (or 2859079 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201210202221021 its reverse (120122202012102), we get a palindrome (321332404233123).

The spelling of 201210202221021 in words is "two hundred one trillion, two hundred ten billion, two hundred two million, two hundred twenty-one thousand, twenty-one".