121552261040 has 80 divisors (see below), whose sum is σ = 329853745152. Its totient is φ = 40788348672.

The previous prime is 121552261031. The next prime is 121552261043. The reversal of 121552261040 is 40162255121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 121552260994 and 121552261012.

It is not an unprimeable number, because it can be changed into a prime (121552261043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2282804 + ... + 2335443.

Almost surely, 2^121552261040 is an apocalyptic number.

121552261040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121552261040 is an abundant number, since it is smaller than the sum of its proper divisors (208301484112).

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

121552261040 is a wasteful number, since it uses less digits than its factorization.

121552261040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4618314 (or 4618308 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 121552261040 in words is "one hundred twenty-one billion, five hundred fifty-two million, two hundred sixty-one thousand, forty".