201211001112001 has 4 divisors (see below), whose sum is σ = 201278908978992. Its totient is φ = 201143093245012.

The previous prime is 201211001111971. The next prime is 201211001112031. The reversal of 201211001112001 is 100211100112102.

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 an interprime number because it is at equal distance from previous prime (201211001111971) and next prime (201211001112031).

It is a cyclic number.

It is not a de Polignac number, because 201211001112001 - 2¹⁵ = 201211001079233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211001112031) 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, 33953929051 + ... + 33953934976.

It is an arithmetic number, because the mean of its divisors is an integer number (50319727244748).

Almost surely, 2^{201211001112001} is an apocalyptic number.

It is an amenable number.

201211001112001 is a deficient number, since it is larger than the sum of its proper divisors (67907866991).

201211001112001 is an equidigital number, since it uses as much as digits as its factorization.

201211001112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67907866990.

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

Adding to 201211001112001 its reverse (100211100112102), we get a palindrome (301422101224103).

The spelling of 201211001112001 in words is "two hundred one trillion, two hundred eleven billion, one million, one hundred twelve thousand, one".