121121012323 has 4 divisors (see below), whose sum is σ = 121174301448. Its totient is φ = 121067723200.

The previous prime is 121121012317. The next prime is 121121012359. The reversal of 121121012323 is 323210121121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121121012323 - 2¹³ = 121121004131 is a prime.

It is a super-2 number, since 2×121121012323² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121121012323.

It is not an unprimeable number, because it can be changed into a prime (121121052323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26641153 + ... + 26645698.

It is an arithmetic number, because the mean of its divisors is an integer number (30293575362).

Almost surely, 2^121121012323 is an apocalyptic number.

121121012323 is a deficient number, since it is larger than the sum of its proper divisors (53289125).

121121012323 is an equidigital number, since it uses as much as digits as its factorization.

121121012323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53289124.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121121012323 its reverse (323210121121), we get a palindrome (444331133444).

The spelling of 121121012323 in words is "one hundred twenty-one billion, one hundred twenty-one million, twelve thousand, three hundred twenty-three".