201121120211111 has 8 divisors (see below), whose sum is σ = 201652552523520. Its totient is φ = 200589691950648.

The previous prime is 201121120211101. The next prime is 201121120211113. The reversal of 201121120211111 is 111112021121102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121120211111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201121120211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121120211113) 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, 116316080 + ... + 118032506.

It is an arithmetic number, because the mean of its divisors is an integer number (25206569065440).

Almost surely, 2^{201121120211111} is an apocalyptic number.

201121120211111 is a deficient number, since it is larger than the sum of its proper divisors (531432312409).

201121120211111 is a wasteful number, since it uses less digits than its factorization.

201121120211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025973.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 201121120211111 its reverse (111112021121102), we get a palindrome (312233141332213).

Subtracting from 201121120211111 its reverse (111112021121102), we obtain a palindrome (90009099090009).

The spelling of 201121120211111 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty million, two hundred eleven thousand, one hundred eleven".