201011011221 has 16 divisors (see below), whose sum is σ = 275459889024. Its totient is φ = 130290041664.

The previous prime is 201011011183. The next prime is 201011011259. The reversal of 201011011221 is 122110110102.

It is an interprime number because it is at equal distance from previous prime (201011011183) and next prime (201011011259).

It is not a de Polignac number, because 201011011221 - 2²² = 201006816917 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201011011197 and 201011011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011011021) 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, 510630 + ... + 814103.

It is an arithmetic number, because the mean of its divisors is an integer number (17216243064).

Almost surely, 2^201011011221 is an apocalyptic number.

It is an amenable number.

201011011221 is a deficient number, since it is larger than the sum of its proper divisors (74448877803).

201011011221 is a wasteful number, since it uses less digits than its factorization.

201011011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326140.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201011011221 its reverse (122110110102), we get a palindrome (323121121323).

The spelling of 201011011221 in words is "two hundred one billion, eleven million, eleven thousand, two hundred twenty-one".