201111111202120 has 96 divisors (see below), whose sum is σ = 527519370442680. Its totient is φ = 68802809349120.

The previous prime is 201111111202097. The next prime is 201111111202147. The reversal of 201111111202120 is 21202111111102.

It can be written as a sum of positive squares in 4 ways, for example, as 84927762571876 + 116183348630244 = 9215626^2 + 10778838^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201111111202094 and 201111111202103.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110384629 + ... + 112191748.

Almost surely, 2^{201111111202120} is an apocalyptic number.

201111111202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111111202120 is an abundant number, since it is smaller than the sum of its proper divisors (326408259240560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111111202120 is a wasteful number, since it uses less digits than its factorization.

201111111202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222576863 (or 222576852 counting only the distinct ones).

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

Adding to 201111111202120 its reverse (21202111111102), we get a palindrome (222313222313222).

The spelling of 201111111202120 in words is "two hundred one trillion, one hundred eleven billion, one hundred eleven million, two hundred two thousand, one hundred twenty".