201111212010001 has 24 divisors (see below), whose sum is σ = 207495144259200. Its totient is φ = 194867138407200.

The previous prime is 201111212009993. The next prime is 201111212010013. The reversal of 201111212010001 is 100010212111102.

It is a happy number.

It is not a de Polignac number, because 201111212010001 - 2³ = 201111212009993 is a prime.

It is a super-2 number, since 2×201111212010001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111212010301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1165498791 + ... + 1165671331.

It is an arithmetic number, because the mean of its divisors is an integer number (8645631010800).

Almost surely, 2^{201111212010001} is an apocalyptic number.

It is an amenable number.

201111212010001 is a deficient number, since it is larger than the sum of its proper divisors (6383932249199).

201111212010001 is an equidigital number, since it uses as much as digits as its factorization.

201111212010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176661 (or 176590 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201111212010001 its reverse (100010212111102), we get a palindrome (301121424121103).

The spelling of 201111212010001 in words is "two hundred one trillion, one hundred eleven billion, two hundred twelve million, ten thousand, one".