201667121 has 8 divisors (see below), whose sum is σ = 219129600. Its totient is φ = 184889520.

The previous prime is 201667111. The next prime is 201667139. The reversal of 201667121 is 121766102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201667121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201667111) 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, 170606 + ... + 171783.

It is an arithmetic number, because the mean of its divisors is an integer number (27391200).

Almost surely, 2^201667121 is an apocalyptic number.

It is an amenable number.

201667121 is a deficient number, since it is larger than the sum of its proper divisors (17462479).

201667121 is a wasteful number, since it uses less digits than its factorization.

201667121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342439.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 201667121 is about 14200.9549326797. The cubic root of 201667121 is about 586.4239507265.

The spelling of 201667121 in words is "two hundred one million, six hundred sixty-seven thousand, one hundred twenty-one".