121645332240 has 80 divisors (see below), whose sum is σ = 377134040448. Its totient is φ = 32435872768.

The previous prime is 121645332217. The next prime is 121645332251. The reversal of 121645332240 is 42233546121.

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

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, 5262949 + ... + 5286011.

Almost surely, 2^121645332240 is an apocalyptic number.

121645332240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121645332240 is an abundant number, since it is smaller than the sum of its proper divisors (255488708208).

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

121645332240 is a wasteful number, since it uses less digits than its factorization.

121645332240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45056 (or 45050 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 121645332240 its reverse (42233546121), we get a palindrome (163878878361).

The spelling of 121645332240 in words is "one hundred twenty-one billion, six hundred forty-five million, three hundred thirty-two thousand, two hundred forty".