121234650456 has 128 divisors (see below), whose sum is σ = 324941414400. Its totient is φ = 37626483840.

The previous prime is 121234650431. The next prime is 121234650473. The reversal of 121234650456 is 654056432121.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2033731 + ... + 2092493.

It is an arithmetic number, because the mean of its divisors is an integer number (2538604800).

Almost surely, 2^121234650456 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 121234650456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162470707200).

121234650456 is an abundant number, since it is smaller than the sum of its proper divisors (203706763944).

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

121234650456 is a wasteful number, since it uses less digits than its factorization.

121234650456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58909 (or 58905 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 121234650456 in words is "one hundred twenty-one billion, two hundred thirty-four million, six hundred fifty thousand, four hundred fifty-six".