201132131221 has 4 divisors (see below), whose sum is σ = 229865292832. Its totient is φ = 172398969612.

The previous prime is 201132131203. The next prime is 201132131231. The reversal of 201132131221 is 122131231102.

201132131221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 201132131221 - 2¹³ = 201132123029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201132131231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14366580795 + ... + 14366580808.

It is an arithmetic number, because the mean of its divisors is an integer number (57466323208).

Almost surely, 2^201132131221 is an apocalyptic number.

It is an amenable number.

201132131221 is a deficient number, since it is larger than the sum of its proper divisors (28733161611).

201132131221 is an equidigital number, since it uses as much as digits as its factorization.

201132131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28733161610.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 201132131221 its reverse (122131231102), we get a palindrome (323263362323).

The spelling of 201132131221 in words is "two hundred one billion, one hundred thirty-two million, one hundred thirty-one thousand, two hundred twenty-one".