201111002122221 has 24 divisors (see below), whose sum is σ = 296367186323520. Its totient is φ = 131377761374400.

The previous prime is 201111002122183. The next prime is 201111002122243. The reversal of 201111002122221 is 122221200111102.

201111002122221 is a `hidden beast` number, since 20 + 111 + 100 + 212 + 2 + 221 = 666.

It is not a de Polignac number, because 201111002122221 - 2¹¹ = 201111002120173 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201111002122194 and 201111002122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111002162221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 608741800 + ... + 609072081.

It is an arithmetic number, because the mean of its divisors is an integer number (12348632763480).

Almost surely, 2^{201111002122221} is an apocalyptic number.

It is an amenable number.

201111002122221 is a deficient number, since it is larger than the sum of its proper divisors (95256184201299).

201111002122221 is a wasteful number, since it uses less digits than its factorization.

201111002122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217814257 (or 1217814254 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201111002122221 its reverse (122221200111102), we get a palindrome (323332202233323).

The spelling of 201111002122221 in words is "two hundred one trillion, one hundred eleven billion, two million, one hundred twenty-two thousand, two hundred twenty-one".