201121120021111 has 6 divisors (see below), whose sum is σ = 210245707697480. Its totient is φ = 192376723497948.

The previous prime is 201121120021067. The next prime is 201121120021121. The reversal of 201121120021111 is 111120021121102.

It is not a de Polignac number, because 201121120021111 - 2¹¹ = 201121120019063 is a prime.

It is a super-2 number, since 2×201121120021111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121120021121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 190095576051 + ... + 190095577108.

Almost surely, 2^{201121120021111} is an apocalyptic number.

201121120021111 is a deficient number, since it is larger than the sum of its proper divisors (9124587676369).

201121120021111 is an equidigital number, since it uses as much as digits as its factorization.

201121120021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380191153205 (or 380191153182 counting only the distinct ones).

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

Adding to 201121120021111 its reverse (111120021121102), we get a palindrome (312241141142213).

The spelling of 201121120021111 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one hundred eleven".