201211211120001 has 4 divisors (see below), whose sum is σ = 268281614826672. Its totient is φ = 134140807413332.

The previous prime is 201211211119999. The next prime is 201211211120047. The reversal of 201211211120001 is 100021112112102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201211211120001 - 2¹ = 201211211119999 is a prime.

It is a super-2 number, since 2×201211211120001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201211211120501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33535201853331 + ... + 33535201853336.

It is an arithmetic number, because the mean of its divisors is an integer number (67070403706668).

Almost surely, 2^{201211211120001} is an apocalyptic number.

It is an amenable number.

201211211120001 is a deficient number, since it is larger than the sum of its proper divisors (67070403706671).

201211211120001 is an equidigital number, since it uses as much as digits as its factorization.

201211211120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67070403706670.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201211211120001 its reverse (100021112112102), we get a palindrome (301232323232103).

The spelling of 201211211120001 in words is "two hundred one trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty thousand, one".