121422147394432 has 128 divisors (see below), whose sum is σ = 265009317732000. Its totient is φ = 55158545842176.

The previous prime is 121422147394399. The next prime is 121422147394441. The reversal of 121422147394432 is 234493741224121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322083744 + ... + 322460512.

Almost surely, 2^{121422147394432} 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 121422147394432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132504658866000).

121422147394432 is an abundant number, since it is smaller than the sum of its proper divisors (143587170337568).

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

121422147394432 is a wasteful number, since it uses less digits than its factorization.

121422147394432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381936 (or 381924 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 49.

The spelling of 121422147394432 in words is "one hundred twenty-one trillion, four hundred twenty-two billion, one hundred forty-seven million, three hundred ninety-four thousand, four hundred thirty-two".