201121120212021 has 20 divisors (see below), whose sum is σ = 303414847299564. Its totient is φ = 132753214656000.

The previous prime is 201121120212013. The next prime is 201121120212031. The reversal of 201121120212021 is 120212021121102.

201121120212021 is a `hidden beast` number, since 201 + 1 + 211 + 20 + 212 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 85146959255121 + 115974160956900 = 9227511^2 + 10769130^2 .

It is not a de Polignac number, because 201121120212021 - 2³ = 201121120212013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201121120211985 and 201121120212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121120212031) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12291956140 + ... + 12291972501.

Almost surely, 2^{201121120212021} is an apocalyptic number.

It is an amenable number.

201121120212021 is a deficient number, since it is larger than the sum of its proper divisors (102293727087543).

201121120212021 is a wasteful number, since it uses less digits than its factorization.

201121120212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24583928754 (or 24583928745 counting only the distinct ones).

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

Adding to 201121120212021 its reverse (120212021121102), we get a palindrome (321333141333123).

The spelling of 201121120212021 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twelve thousand, twenty-one".