201121200111 has 16 divisors (see below), whose sum is σ = 291648722400. Its totient is φ = 122541475200.

The previous prime is 201121200097. The next prime is 201121200121. The reversal of 201121200111 is 111002121102.

It is not a de Polignac number, because 201121200111 - 2⁵ = 201121200079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121200121) 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, 25525536 + ... + 25533413.

It is an arithmetic number, because the mean of its divisors is an integer number (18228045150).

Almost surely, 2^201121200111 is an apocalyptic number.

201121200111 is a deficient number, since it is larger than the sum of its proper divisors (90527522289).

201121200111 is a wasteful number, since it uses less digits than its factorization.

201121200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51059066.

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

Adding to 201121200111 its reverse (111002121102), we get a palindrome (312123321213).

The spelling of 201121200111 in words is "two hundred one billion, one hundred twenty-one million, two hundred thousand, one hundred eleven".