201193121 has 4 divisors (see below), whose sum is σ = 209940672. Its totient is φ = 192445572.

The previous prime is 201193103. The next prime is 201193123. The reversal of 201193121 is 121391102.

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 201193121 - 2¹⁴ = 201176737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201193093 and 201193102.

It is not an unprimeable number, because it can be changed into a prime (201193123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4373741 + ... + 4373786.

It is an arithmetic number, because the mean of its divisors is an integer number (52485168).

Almost surely, 2^201193121 is an apocalyptic number.

It is an amenable number.

201193121 is a deficient number, since it is larger than the sum of its proper divisors (8747551).

201193121 is an equidigital number, since it uses as much as digits as its factorization.

201193121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747550.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 201193121 is about 14184.2560961088. The cubic root of 201193121 is about 585.9641451269.

The spelling of 201193121 in words is "two hundred one million, one hundred ninety-three thousand, one hundred twenty-one".