201021100112021 has 8 divisors (see below), whose sum is σ = 229739013820800. Its totient is φ = 172303339826448.

The previous prime is 201021100112017. The next prime is 201021100112023. The reversal of 201021100112021 is 120211001120102.

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 201021100112021 - 2² = 201021100112017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201021100111987 and 201021100112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021100112023) 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, 35534306 + ... + 40801091.

It is an arithmetic number, because the mean of its divisors is an integer number (28717376727600).

Almost surely, 2^{201021100112021} is an apocalyptic number.

It is an amenable number.

201021100112021 is a deficient number, since it is larger than the sum of its proper divisors (28717913708779).

201021100112021 is an equidigital number, since it uses as much as digits as its factorization.

201021100112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76711603.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201021100112021 its reverse (120211001120102), we get a palindrome (321232101232123).

The spelling of 201021100112021 in words is "two hundred one trillion, twenty-one billion, one hundred million, one hundred twelve thousand, twenty-one".