201121123 has 8 divisors (see below), whose sum is σ = 232762880. Its totient is φ = 170206920.

The previous prime is 201121117. The next prime is 201121133. The reversal of 201121123 is 321121102.

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

It is a cyclic number.

It is not a de Polignac number, because 201121123 - 2¹³ = 201112931 is a prime.

It is a super-2 number, since 2×201121123² = 80899412233562258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201121103) 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 7 ways as a sum of consecutive naturals, for example, 181293 + ... + 182398.

It is an arithmetic number, because the mean of its divisors is an integer number (29095360).

Almost surely, 2^201121123 is an apocalyptic number.

201121123 is a deficient number, since it is larger than the sum of its proper divisors (31641757).

201121123 is an equidigital number, since it uses as much as digits as its factorization.

201121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363777.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 201121123 is about 14181.7179142726. The cubic root of 201121123 is about 585.8942400199.

Adding to 201121123 its reverse (321121102), we get a palindrome (522242225).

The spelling of 201121123 in words is "two hundred one million, one hundred twenty-one thousand, one hundred twenty-three".