201121100200021 has 8 divisors (see below), whose sum is σ = 211706578136000. Its totient is φ = 190535637951360.

The previous prime is 201121100200003. The next prime is 201121100200037. The reversal of 201121100200021 is 120002001121102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201121100200021 - 2¹⁹ = 201121099675733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201121100199974 and 201121100200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121100200001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29852005 + ... + 35963653.

It is an arithmetic number, because the mean of its divisors is an integer number (26463322267000).

Almost surely, 2^{201121100200021} is an apocalyptic number.

It is an amenable number.

201121100200021 is a deficient number, since it is larger than the sum of its proper divisors (10585477935979).

201121100200021 is a wasteful number, since it uses less digits than its factorization.

201121100200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843659.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201121100200021 its reverse (120002001121102), we get a palindrome (321123101321123).

The spelling of 201121100200021 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred million, two hundred thousand, twenty-one".