162001121 has 4 divisors (see below), whose sum is σ = 169044672. Its totient is φ = 154957572.

The previous prime is 162001117. The next prime is 162001129. The reversal of 162001121 is 121100261.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121100261 = 1289 ⋅93949.

It is a cyclic number.

It is not a de Polignac number, because 162001121 - 2² = 162001117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 162001096 and 162001105.

It is not an unprimeable number, because it can be changed into a prime (162001129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3521741 + ... + 3521786.

It is an arithmetic number, because the mean of its divisors is an integer number (42261168).

Almost surely, 2^162001121 is an apocalyptic number.

It is an amenable number.

162001121 is a deficient number, since it is larger than the sum of its proper divisors (7043551).

162001121 is an equidigital number, since it uses as much as digits as its factorization.

162001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043550.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 162001121 is about 12727.9660983207. The cubic root of 162001121 is about 545.1374352493.

Adding to 162001121 its reverse (121100261), we get a palindrome (283101382).

The spelling of 162001121 in words is "one hundred sixty-two million, one thousand, one hundred twenty-one".