121323243012 has 24 divisors (see below), whose sum is σ = 289110708096. Its totient is φ = 39580632288.

The previous prime is 121323243011. The next prime is 121323243023. The reversal of 121323243012 is 210342323121.

It is not an unprimeable number, because it can be changed into a prime (121323243011) 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, 107555503 + ... + 107556630.

It is an arithmetic number, because the mean of its divisors is an integer number (12046279504).

Almost surely, 2^121323243012 is an apocalyptic number.

121323243012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121323243012 is an abundant number, since it is smaller than the sum of its proper divisors (167787465084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121323243012 is a wasteful number, since it uses less digits than its factorization.

121323243012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215112187 (or 215112185 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 121323243012 its reverse (210342323121), we get a palindrome (331665566133).

The spelling of 121323243012 in words is "one hundred twenty-one billion, three hundred twenty-three million, two hundred forty-three thousand, twelve".