320101123121 has 4 divisors (see below), whose sum is σ = 344724286452. Its totient is φ = 295477959792.

The previous prime is 320101123117. The next prime is 320101123123. The reversal of 320101123121 is 121321101023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121321101023 = 139241 ⋅871303.

It can be written as a sum of positive squares in 2 ways, for example, as 165294286096 + 154806837025 = 406564^2 + 393455^2 .

It is a cyclic number.

It is not a de Polignac number, because 320101123121 - 2² = 320101123117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320101123121.

It is not an unprimeable number, because it can be changed into a prime (320101123123) 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, 12311581646 + ... + 12311581671.

It is an arithmetic number, because the mean of its divisors is an integer number (86181071613).

Almost surely, 2^320101123121 is an apocalyptic number.

It is an amenable number.

320101123121 is a deficient number, since it is larger than the sum of its proper divisors (24623163331).

320101123121 is a wasteful number, since it uses less digits than its factorization.

320101123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24623163330.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 320101123121 its reverse (121321101023), we get a palindrome (441422224144).

The spelling of 320101123121 in words is "three hundred twenty billion, one hundred one million, one hundred twenty-three thousand, one hundred twenty-one".