201011031231221 has 16 divisors (see below), whose sum is σ = 202572779136000. Its totient is φ = 199454963925888.

The previous prime is 201011031231187. The next prime is 201011031231277. The reversal of 201011031231221 is 122132130110102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201011031231221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201011031231193 and 201011031231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011031231721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492671921 + ... + 493079753.

It is an arithmetic number, because the mean of its divisors is an integer number (12660798696000).

Almost surely, 2^{201011031231221} is an apocalyptic number.

It is an amenable number.

201011031231221 is a deficient number, since it is larger than the sum of its proper divisors (1561747904779).

201011031231221 is a wasteful number, since it uses less digits than its factorization.

201011031231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414788.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 201011031231221 its reverse (122132130110102), we get a palindrome (323143161341323).

The spelling of 201011031231221 in words is "two hundred one trillion, eleven billion, thirty-one million, two hundred thirty-one thousand, two hundred twenty-one".