121402143312 has 20 divisors (see below), whose sum is σ = 313622203680. Its totient is φ = 40467381088.

The previous prime is 121402143221. The next prime is 121402143341. The reversal of 121402143312 is 213341204121.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1264605612 + ... + 1264605707.

It is an arithmetic number, because the mean of its divisors is an integer number (15681110184).

Almost surely, 2^121402143312 is an apocalyptic number.

121402143312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121402143312 is an abundant number, since it is smaller than the sum of its proper divisors (192220060368).

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

121402143312 is a wasteful number, since it uses less digits than its factorization.

121402143312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529211330 (or 2529211324 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 121402143312 its reverse (213341204121), we get a palindrome (334743347433).

The spelling of 121402143312 in words is "one hundred twenty-one billion, four hundred two million, one hundred forty-three thousand, three hundred twelve".