201121020210021 has 32 divisors (see below), whose sum is σ = 292010420400000. Its totient is φ = 122642965686528.

The previous prime is 201121020210013. The next prime is 201121020210023. The reversal of 201121020210021 is 120012020121102.

It is not a de Polignac number, because 201121020210021 - 2³ = 201121020210013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121020210023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 532230855 + ... + 532608603.

It is an arithmetic number, because the mean of its divisors is an integer number (9125325637500).

Almost surely, 2^{201121020210021} is an apocalyptic number.

It is an amenable number.

201121020210021 is a deficient number, since it is larger than the sum of its proper divisors (90889400189979).

201121020210021 is a wasteful number, since it uses less digits than its factorization.

201121020210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699893.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201121020210021 its reverse (120012020121102), we get a palindrome (321133040331123).

The spelling of 201121020210021 in words is "two hundred one trillion, one hundred twenty-one billion, twenty million, two hundred ten thousand, twenty-one".