201102011201221 has 4 divisors (see below), whose sum is σ = 216571396678252. Its totient is φ = 185632625724192.

The previous prime is 201102011201213. The next prime is 201102011201239. The reversal of 201102011201221 is 122102110201102.

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 127342513128996 + 73759498072225 = 11284614^2 + 8588335^2 .

It is a cyclic number.

It is not a de Polignac number, because 201102011201221 - 2³ = 201102011201213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201102011201195 and 201102011201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201102011201291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7734692738496 + ... + 7734692738521.

It is an arithmetic number, because the mean of its divisors is an integer number (54142849169563).

Almost surely, 2^{201102011201221} is an apocalyptic number.

It is an amenable number.

201102011201221 is a deficient number, since it is larger than the sum of its proper divisors (15469385477031).

201102011201221 is a wasteful number, since it uses less digits than its factorization.

201102011201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15469385477030.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201102011201221 its reverse (122102110201102), we get a palindrome (323204121402323).

The spelling of 201102011201221 in words is "two hundred one trillion, one hundred two billion, eleven million, two hundred one thousand, two hundred twenty-one".