121456245240 has 192 divisors, whose sum is σ = 453281961600. Its totient is φ = 27894240000.

The previous prime is 121456245191. The next prime is 121456245319. The reversal of 121456245240 is 42542654121.

121456245240 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 5 + 624 + 5 + 24 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 121456245195 and 121456245204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 731886 + ... + 882365.

It is an arithmetic number, because the mean of its divisors is an integer number (2360843550).

Almost surely, 2^121456245240 is an apocalyptic number.

121456245240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121456245240 is an abundant number, since it is smaller than the sum of its proper divisors (331825716360).

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

121456245240 is a wasteful number, since it uses less digits than its factorization.

121456245240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614298 (or 1614291 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 121456245240 its reverse (42542654121), we get a palindrome (163998899361).

The spelling of 121456245240 in words is "one hundred twenty-one billion, four hundred fifty-six million, two hundred forty-five thousand, two hundred forty".