121383165480 has 64 divisors (see below), whose sum is σ = 367903650240. Its totient is φ = 32035141632.

The previous prime is 121383165461. The next prime is 121383165487. The reversal of 121383165480 is 84561383121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121383165487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5202414 + ... + 5225693.

It is an arithmetic number, because the mean of its divisors is an integer number (5748494535).

Almost surely, 2^121383165480 is an apocalyptic number.

121383165480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121383165480 is an abundant number, since it is smaller than the sum of its proper divisors (246520484760).

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

121383165480 is a wasteful number, since it uses less digits than its factorization.

121383165480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10428218 (or 10428214 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 121383165480 in words is "one hundred twenty-one billion, three hundred eighty-three million, one hundred sixty-five thousand, four hundred eighty".