201842121 has 16 divisors (see below), whose sum is σ = 293086080. Its totient is φ = 122812800.

The previous prime is 201842087. The next prime is 201842131. The reversal of 201842121 is 121248102.

It is not a de Polignac number, because 201842121 - 2¹⁴ = 201825737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201842131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25605 + ... + 32546.

It is an arithmetic number, because the mean of its divisors is an integer number (18317880).

Almost surely, 2^201842121 is an apocalyptic number.

It is an amenable number.

201842121 is a deficient number, since it is larger than the sum of its proper divisors (91243959).

201842121 is a wasteful number, since it uses less digits than its factorization.

201842121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58256.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 201842121 is about 14207.1151540346. The cubic root of 201842121 is about 586.5935280652.

The spelling of 201842121 in words is "two hundred one million, eight hundred forty-two thousand, one hundred twenty-one".