121355448438 has 32 divisors (see below), whose sum is σ = 277399353600. Its totient is φ = 34671051360.

The previous prime is 121355448367. The next prime is 121355448463. The reversal of 121355448438 is 834844553121.

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, 792753 + ... + 933363.

It is an arithmetic number, because the mean of its divisors is an integer number (8668729800).

Almost surely, 2^121355448438 is an apocalyptic number.

121355448438 is an abundant number, since it is smaller than the sum of its proper divisors (156043905162).

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

121355448438 is a wasteful number, since it uses less digits than its factorization.

121355448438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161172.

The product of its digits is 1843200, while the sum is 48.

The spelling of 121355448438 in words is "one hundred twenty-one billion, three hundred fifty-five million, four hundred forty-eight thousand, four hundred thirty-eight".