121550314432 has 56 divisors (see below), whose sum is σ = 255543070320. Its totient is φ = 57165803520.

The previous prime is 121550314423. The next prime is 121550314469. The reversal of 121550314432 is 234413055121.

It is a junction number, because it is equal to n+sod(n) for n = 121550314394 and 121550314403.

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 7 ways as a sum of consecutive naturals, for example, 1826707 + ... + 1892077.

Almost surely, 2^121550314432 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 121550314432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127771535160).

121550314432 is an abundant number, since it is smaller than the sum of its proper divisors (133992755888).

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

121550314432 is a wasteful number, since it uses less digits than its factorization.

121550314432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67109 (or 67099 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 121550314432 its reverse (234413055121), we get a palindrome (355963369553).

The spelling of 121550314432 in words is "one hundred twenty-one billion, five hundred fifty million, three hundred fourteen thousand, four hundred thirty-two".