121353340540 has 24 divisors (see below), whose sum is σ = 255789394560. Its totient is φ = 48360883008.

The previous prime is 121353340529. The next prime is 121353340541. The reversal of 121353340540 is 45043353121.

121353340540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121353340541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11272812 + ... + 11283571.

It is an arithmetic number, because the mean of its divisors is an integer number (10657891440).

Almost surely, 2^121353340540 is an apocalyptic number.

121353340540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121353340540 is an abundant number, since it is smaller than the sum of its proper divisors (134436054020).

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

121353340540 is a wasteful number, since it uses less digits than its factorization.

121353340540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22556661 (or 22556659 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 121353340540 its reverse (45043353121), we get a palindrome (166396693661).

The spelling of 121353340540 in words is "one hundred twenty-one billion, three hundred fifty-three million, three hundred forty thousand, five hundred forty".