201101201202221 has 4 divisors (see below), whose sum is σ = 201101943650844. Its totient is φ = 201100458753600.

The previous prime is 201101201202211. The next prime is 201101201202283. The reversal of 201101201202221 is 122202102101102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177659975077225 + 23441226124996 = 13328915^2 + 4841614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201101201202221 is a prime.

It is a super-3 number, since 3×201101201202221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201101201202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101201202211) 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, 370817870 + ... + 371359791.

It is an arithmetic number, because the mean of its divisors is an integer number (50275485912711).

Almost surely, 2^{201101201202221} is an apocalyptic number.

It is an amenable number.

201101201202221 is a deficient number, since it is larger than the sum of its proper divisors (742448623).

201101201202221 is an equidigital number, since it uses as much as digits as its factorization.

201101201202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742448622.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201101201202221 its reverse (122202102101102), we get a palindrome (323303303303323).

The spelling of 201101201202221 in words is "two hundred one trillion, one hundred one billion, two hundred one million, two hundred two thousand, two hundred twenty-one".