201121671 has 8 divisors (see below), whose sum is σ = 268280560. Its totient is φ = 134021952.

The previous prime is 201121651. The next prime is 201121673. The reversal of 201121671 is 176121102.

It is a happy number.

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

It is not a de Polignac number, because 201121671 - 2¹⁷ = 200990599 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 (201121673) 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, 6136 + ... + 20973.

It is an arithmetic number, because the mean of its divisors is an integer number (33535070).

Almost surely, 2^201121671 is an apocalyptic number.

201121671 is a deficient number, since it is larger than the sum of its proper divisors (67158889).

201121671 is a wasteful number, since it uses less digits than its factorization.

201121671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29585.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 201121671 is about 14181.7372349088. The cubic root of 201121671 is about 585.8947721532.

Adding to 201121671 its reverse (176121102), we get a palindrome (377242773).

The spelling of 201121671 in words is "two hundred one million, one hundred twenty-one thousand, six hundred seventy-one".