201164021 has 4 divisors (see below), whose sum is σ = 201194592. Its totient is φ = 201133452.

The previous prime is 201164017. The next prime is 201164071. The reversal of 201164021 is 120461102.

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 201164021 - 2² = 201164017 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 (201164071) 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, 905 + ... + 20078.

It is an arithmetic number, because the mean of its divisors is an integer number (50298648).

Almost surely, 2^201164021 is an apocalyptic number.

It is an amenable number.

201164021 is a deficient number, since it is larger than the sum of its proper divisors (30571).

201164021 is an equidigital number, since it uses as much as digits as its factorization.

201164021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30570.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 201164021 is about 14183.2302738128. The cubic root of 201164021 is about 585.9358930364.

The spelling of 201164021 in words is "two hundred one million, one hundred sixty-four thousand, twenty-one".