201121221200101 has 4 divisors (see below), whose sum is σ = 201121252260192. Its totient is φ = 201121190140012.

The previous prime is 201121221200057. The next prime is 201121221200113. The reversal of 201121221200101 is 101002122121102.

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 201121221200101 - 2⁴¹ = 198922197944549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121221210101) 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, 1729051 + ... + 20130376.

It is an arithmetic number, because the mean of its divisors is an integer number (50280313065048).

Almost surely, 2^{201121221200101} is an apocalyptic number.

It is an amenable number.

201121221200101 is a deficient number, since it is larger than the sum of its proper divisors (31060091).

201121221200101 is an equidigital number, since it uses as much as digits as its factorization.

201121221200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31060090.

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

Adding to 201121221200101 its reverse (101002122121102), we get a palindrome (302123343321203).

The spelling of 201121221200101 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, one hundred one".