121002320123 has 16 divisors (see below), whose sum is σ = 122638365696. Its totient is φ = 119378581920.

The previous prime is 121002320099. The next prime is 121002320147. The reversal of 121002320123 is 321023200121.

It is an interprime number because it is at equal distance from previous prime (121002320099) and next prime (121002320147).

It is a cyclic number.

It is not a de Polignac number, because 121002320123 - 2¹⁰ = 121002319099 is a prime.

It is a super-2 number, since 2×121002320123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121002320183) 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 15 ways as a sum of consecutive naturals, for example, 25617440 + ... + 25622162.

It is an arithmetic number, because the mean of its divisors is an integer number (7664897856).

Almost surely, 2^121002320123 is an apocalyptic number.

121002320123 is a deficient number, since it is larger than the sum of its proper divisors (1636045573).

121002320123 is a wasteful number, since it uses less digits than its factorization.

121002320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5954.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 121002320123 its reverse (321023200121), we get a palindrome (442025520244).

The spelling of 121002320123 in words is "one hundred twenty-one billion, two million, three hundred twenty thousand, one hundred twenty-three".