201121012112021 has 8 divisors (see below), whose sum is σ = 201642628301400. Its totient is φ = 200599419490560.

The previous prime is 201121012111991. The next prime is 201121012112063. The reversal of 201121012112021 is 120211210121102.

It can be written as a sum of positive squares in 4 ways, for example, as 7880152879921 + 193240859232100 = 2807161^2 + 13901110^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121012112021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121012112071) 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, 11262185 + ... + 23001713.

It is an arithmetic number, because the mean of its divisors is an integer number (25205328537675).

Almost surely, 2^{201121012112021} is an apocalyptic number.

It is an amenable number.

201121012112021 is a deficient number, since it is larger than the sum of its proper divisors (521616189379).

201121012112021 is a wasteful number, since it uses less digits than its factorization.

201121012112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11783959.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201121012112021 its reverse (120211210121102), we get a palindrome (321332222233123).

The spelling of 201121012112021 in words is "two hundred one trillion, one hundred twenty-one billion, twelve million, one hundred twelve thousand, twenty-one".