201351452521 has 4 divisors (see below), whose sum is σ = 204187388544. Its totient is φ = 198515516500.

The previous prime is 201351452509. The next prime is 201351452531. The reversal of 201351452521 is 125254153102.

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 201351452521 - 2²¹ = 201349355369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201351452531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417967905 + ... + 1417968046.

It is an arithmetic number, because the mean of its divisors is an integer number (51046847136).

Almost surely, 2^201351452521 is an apocalyptic number.

It is an amenable number.

201351452521 is a deficient number, since it is larger than the sum of its proper divisors (2835936023).

201351452521 is an equidigital number, since it uses as much as digits as its factorization.

201351452521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835936022.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 201351452521 in words is "two hundred one billion, three hundred fifty-one million, four hundred fifty-two thousand, five hundred twenty-one".