201021147 has 12 divisors (see below), whose sum is σ = 291358704. Its totient is φ = 133554960.

The previous prime is 201021137. The next prime is 201021167. The reversal of 201021147 is 741120102.

It is not a de Polignac number, because 201021147 - 2¹⁰ = 201020123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201021137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35479 + ... + 40752.

It is an arithmetic number, because the mean of its divisors is an integer number (24279892).

Almost surely, 2^201021147 is an apocalyptic number.

201021147 is a deficient number, since it is larger than the sum of its proper divisors (90337557).

201021147 is a wasteful number, since it uses less digits than its factorization.

201021147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76530 (or 76527 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 201021147 is about 14178.1926563296. The cubic root of 201021147 is about 585.7971425260.

Adding to 201021147 its reverse (741120102), we get a palindrome (942141249).

The spelling of 201021147 in words is "two hundred one million, twenty-one thousand, one hundred forty-seven".