201011111011221 has 32 divisors (see below), whose sum is σ = 328258534176768. Its totient is φ = 106899983150400.

The previous prime is 201011111011181. The next prime is 201011111011261. The reversal of 201011111011221 is 122110111110102.

It is an interprime number because it is at equal distance from previous prime (201011111011181) and next prime (201011111011261).

It is not a de Polignac number, because 201011111011221 - 2¹⁰ = 201011111010197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201011111011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011111011261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5623929055 + ... + 5623964796.

It is an arithmetic number, because the mean of its divisors is an integer number (10258079193024).

Almost surely, 2^{201011111011221} is an apocalyptic number.

201011111011221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201011111011221 is a deficient number, since it is larger than the sum of its proper divisors (127247423165547).

201011111011221 is a wasteful number, since it uses less digits than its factorization.

201011111011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11247893921.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 201011111011221 its reverse (122110111110102), we get a palindrome (323121222121323).

The spelling of 201011111011221 in words is "two hundred one trillion, eleven billion, one hundred eleven million, eleven thousand, two hundred twenty-one".