121354343312 has 80 divisors (see below), whose sum is σ = 252321350400. Its totient is φ = 56431764480.

The previous prime is 121354343269. The next prime is 121354343351. The reversal of 121354343312 is 213343453121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1462523 + ... + 1543269.

It is an arithmetic number, because the mean of its divisors is an integer number (3154016880).

Almost surely, 2^121354343312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121354343312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126160675200).

121354343312 is an abundant number, since it is smaller than the sum of its proper divisors (130967007088).

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

121354343312 is a wasteful number, since it uses less digits than its factorization.

121354343312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80904 (or 80898 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

Adding to 121354343312 its reverse (213343453121), we get a palindrome (334697796433).

The spelling of 121354343312 in words is "one hundred twenty-one billion, three hundred fifty-four million, three hundred forty-three thousand, three hundred twelve".