121212124123140 has 576 divisors, whose sum is σ = 408374817177600. Its totient is φ = 28945892118528.

The previous prime is 121212124123093. The next prime is 121212124123183. The reversal of 121212124123140 is 41321421212121.

121212124123140 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 1 + 212 + 412 + 31 + 4 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 17880528271 + ... + 17880535049.

It is an arithmetic number, because the mean of its divisors is an integer number (708984057600).

Almost surely, 2^{121212124123140} is an apocalyptic number.

121212124123140 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 121212124123140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204187408588800).

121212124123140 is an abundant number, since it is smaller than the sum of its proper divisors (287162693054460).

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

121212124123140 is a wasteful number, since it uses less digits than its factorization.

121212124123140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8136 (or 8131 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 121212124123140 its reverse (41321421212121), we get a palindrome (162533545335261).

The spelling of 121212124123140 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred twenty-four million, one hundred twenty-three thousand, one hundred forty".