201101112001221 has 4 divisors (see below), whose sum is σ = 268134816001632. Its totient is φ = 134067408000812.

The previous prime is 201101112001199. The next prime is 201101112001247. The reversal of 201101112001221 is 122100211101102.

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 201101112001221 - 2¹¹ = 201101111999173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201101112001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101112001291) 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, 33516852000201 + ... + 33516852000206.

It is an arithmetic number, because the mean of its divisors is an integer number (67033704000408).

Almost surely, 2^{201101112001221} is an apocalyptic number.

It is an amenable number.

201101112001221 is a deficient number, since it is larger than the sum of its proper divisors (67033704000411).

201101112001221 is an equidigital number, since it uses as much as digits as its factorization.

201101112001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67033704000410.

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

Adding to 201101112001221 its reverse (122100211101102), we get a palindrome (323201323102323).

The spelling of 201101112001221 in words is "two hundred one trillion, one hundred one billion, one hundred twelve million, one thousand, two hundred twenty-one".