121752032240 has 20 divisors (see below), whose sum is σ = 283073475144. Its totient is φ = 48700812864.

The previous prime is 121752032177. The next prime is 121752032287. The reversal of 121752032240 is 42230257121.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760950122 + ... + 760950281.

Almost surely, 2^121752032240 is an apocalyptic number.

121752032240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121752032240 is an abundant number, since it is smaller than the sum of its proper divisors (161321442904).

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

121752032240 is a wasteful number, since it uses less digits than its factorization.

121752032240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521900416 (or 1521900410 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 121752032240 its reverse (42230257121), we get a palindrome (163982289361).

The spelling of 121752032240 in words is "one hundred twenty-one billion, seven hundred fifty-two million, thirty-two thousand, two hundred forty".