121543250140 has 96 divisors (see below), whose sum is σ = 276493057344. Its totient is φ = 44613918720.

The previous prime is 121543250137. The next prime is 121543250149. The reversal of 121543250140 is 41052345121.

It is a super-2 number, since 2×121543250140² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121543250099 and 121543250108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121543250149) 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 31 ways as a sum of consecutive naturals, for example, 60258412 + ... + 60260428.

It is an arithmetic number, because the mean of its divisors is an integer number (2880136014).

Almost surely, 2^121543250140 is an apocalyptic number.

121543250140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121543250140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138246528672).

121543250140 is an abundant number, since it is smaller than the sum of its proper divisors (154949807204).

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

121543250140 is a wasteful number, since it uses less digits than its factorization.

121543250140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287 (or 3285 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 121543250140 its reverse (41052345121), we get a palindrome (162595595261).

The spelling of 121543250140 in words is "one hundred twenty-one billion, five hundred forty-three million, two hundred fifty thousand, one hundred forty".