201112121033021 has 12 divisors (see below), whose sum is σ = 222202498501116. Its totient is φ = 181881899358720.

The previous prime is 201112121032939. The next prime is 201112121033071. The reversal of 201112121033021 is 120330121211102.

It can be written as a sum of positive squares in 2 ways, for example, as 53670114828121 + 147442006204900 = 7325989^2 + 12142570^2 .

It is a de Polignac number, because none of the positive numbers 2^k-201112121033021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201112121032984 and 201112121033002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201112121033071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4305892826 + ... + 4305939531.

It is an arithmetic number, because the mean of its divisors is an integer number (18516874875093).

Almost surely, 2^{201112121033021} is an apocalyptic number.

It is an amenable number.

201112121033021 is a deficient number, since it is larger than the sum of its proper divisors (21090377468095).

201112121033021 is a wasteful number, since it uses less digits than its factorization.

201112121033021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611832572 (or 8611832561 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 201112121033021 its reverse (120330121211102), we get a palindrome (321442242244123).

The spelling of 201112121033021 in words is "two hundred one trillion, one hundred twelve billion, one hundred twenty-one million, thirty-three thousand, twenty-one".