121153534464 has 80 divisors (see below), whose sum is σ = 324544540320. Its totient is φ = 40161300480.

The previous prime is 121153534459. The next prime is 121153534477. The reversal of 121153534464 is 464435351121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60127 + ... + 495905.

It is an arithmetic number, because the mean of its divisors is an integer number (4056806754).

Almost surely, 2^121153534464 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 121153534464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162272270160).

121153534464 is an abundant number, since it is smaller than the sum of its proper divisors (203391005856).

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

121153534464 is an equidigital number, since it uses as much as digits as its factorization.

121153534464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435981 (or 435965 counting only the distinct ones).

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

Adding to 121153534464 its reverse (464435351121), we get a palindrome (585588885585).

The spelling of 121153534464 in words is "one hundred twenty-one billion, one hundred fifty-three million, five hundred thirty-four thousand, four hundred sixty-four".