201146630021 has 4 divisors (see below), whose sum is σ = 201208391532. Its totient is φ = 201084868512.

The previous prime is 201146630011. The next prime is 201146630033. The reversal of 201146630021 is 120036641102.

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 167981121025 + 33165508996 = 409855^2 + 182114^2 .

It is a cyclic number.

It is not a de Polignac number, because 201146630021 - 2¹⁰ = 201146628997 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 (201146630011) 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, 30875870 + ... + 30882383.

It is an arithmetic number, because the mean of its divisors is an integer number (50302097883).

Almost surely, 2^201146630021 is an apocalyptic number.

It is an amenable number.

201146630021 is a deficient number, since it is larger than the sum of its proper divisors (61761511).

201146630021 is an equidigital number, since it uses as much as digits as its factorization.

201146630021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61761510.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 201146630021 in words is "two hundred one billion, one hundred forty-six million, six hundred thirty thousand, twenty-one".