121401344111424 has 448 divisors, whose sum is σ = 352759693418496. Its totient is φ = 36620925935616.

The previous prime is 121401344111417. The next prime is 121401344111459. The reversal of 121401344111424 is 424111443104121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74160869134 + ... + 74160870770.

It is an arithmetic number, because the mean of its divisors is an integer number (787410029952).

Almost surely, 2^{121401344111424} 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 121401344111424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176379846709248).

121401344111424 is an abundant number, since it is smaller than the sum of its proper divisors (231358349307072).

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

121401344111424 is a wasteful number, since it uses less digits than its factorization.

121401344111424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582 (or 3572 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

Adding to 121401344111424 its reverse (424111443104121), we get a palindrome (545512787215545).

The spelling of 121401344111424 in words is "one hundred twenty-one trillion, four hundred one billion, three hundred forty-four million, one hundred eleven thousand, four hundred twenty-four".