201320821137 has 8 divisors (see below), whose sum is σ = 271033856704. Its totient is φ = 132910833168.

The previous prime is 201320821099. The next prime is 201320821139. The reversal of 201320821137 is 731128023102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201320821137 - 2³⁶ = 132601344401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201320821139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325761538 + ... + 325762155.

It is an arithmetic number, because the mean of its divisors is an integer number (33879232088).

Almost surely, 2^201320821137 is an apocalyptic number.

It is an amenable number.

201320821137 is a deficient number, since it is larger than the sum of its proper divisors (69713035567).

201320821137 is a wasteful number, since it uses less digits than its factorization.

201320821137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651523799.

The product of its (nonzero) digits is 4032, while the sum is 30.

Adding to 201320821137 its reverse (731128023102), we get a palindrome (932448844239).

The spelling of 201320821137 in words is "two hundred one billion, three hundred twenty million, eight hundred twenty-one thousand, one hundred thirty-seven".