201221004111 has 8 divisors (see below), whose sum is σ = 268357243440. Its totient is φ = 134116050432.

The previous prime is 201221004041. The next prime is 201221004133. The reversal of 201221004111 is 111400122102.

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

It is not a de Polignac number, because 201221004111 - 2¹¹ = 201221002063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221004011) 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, 7806400 + ... + 7832133.

It is an arithmetic number, because the mean of its divisors is an integer number (33544655430).

Almost surely, 2^201221004111 is an apocalyptic number.

201221004111 is a deficient number, since it is larger than the sum of its proper divisors (67136239329).

201221004111 is a wasteful number, since it uses less digits than its factorization.

201221004111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15642825.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201221004111 its reverse (111400122102), we get a palindrome (312621126213).

The spelling of 201221004111 in words is "two hundred one billion, two hundred twenty-one million, four thousand, one hundred eleven".