121021320231312 has 80 divisors (see below), whose sum is σ = 312791022355200. Its totient is φ = 40320750412800.

The previous prime is 121021320231307. The next prime is 121021320231353. The reversal of 121021320231312 is 213132023120121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3645313689 + ... + 3645346887.

It is an arithmetic number, because the mean of its divisors is an integer number (3909887779440).

Almost surely, 2^{121021320231312} is an apocalyptic number.

121021320231312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121021320231312 is an abundant number, since it is smaller than the sum of its proper divisors (191769702123888).

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

121021320231312 is a wasteful number, since it uses less digits than its factorization.

121021320231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67992 (or 67986 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 121021320231312 its reverse (213132023120121), we get a palindrome (334153343351433).

The spelling of 121021320231312 in words is "one hundred twenty-one trillion, twenty-one billion, three hundred twenty million, two hundred thirty-one thousand, three hundred twelve".