121540512240000 has 480 divisors, whose sum is σ = 499476543405840. Its totient is φ = 27780687360000.

The previous prime is 121540512239977. The next prime is 121540512240013. The reversal of 121540512240000 is 42215045121.

It is a happy number.

121540512240000 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 405 + 12 + 240 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a super-2 number, since 2×121540512240000² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 7017591 + ... + 17097590.

Almost surely, 2^{121540512240000} is an apocalyptic number.

121540512240000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121540512240000 is an abundant number, since it is smaller than the sum of its proper divisors (377936031165840).

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

121540512240000 is an equidigital number, since it uses as much as digits as its factorization.

121540512240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24115228 (or 24115198 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 121540512240000 its reverse (42215045121), we get a palindrome (121582727285121).

The spelling of 121540512240000 in words is "one hundred twenty-one trillion, five hundred forty billion, five hundred twelve million, two hundred forty thousand".