201111212045 has 8 divisors (see below), whose sum is σ = 241388870424. Its totient is φ = 160852025664.

The previous prime is 201111212021. The next prime is 201111212051. The reversal of 201111212045 is 540212111102.

It can be written as a sum of positive squares in 4 ways, for example, as 114667567876 + 86443644169 = 338626^2 + 294013^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 201111212045 - 2³² = 196816244749 is a prime.

It is a super-2 number, since 2×201111212045² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4594034 + ... + 4637603.

It is an arithmetic number, because the mean of its divisors is an integer number (30173608803).

Almost surely, 2^201111212045 is an apocalyptic number.

It is an amenable number.

201111212045 is a deficient number, since it is larger than the sum of its proper divisors (40277658379).

201111212045 is an equidigital number, since it uses as much as digits as its factorization.

201111212045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9235999.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 201111212045 its reverse (540212111102), we get a palindrome (741323323147).

The spelling of 201111212045 in words is "two hundred one billion, one hundred eleven million, two hundred twelve thousand, forty-five".