121340154450 has 48 divisors (see below), whose sum is σ = 300963701376. Its totient is φ = 32353060800.

The previous prime is 121340154443. The next prime is 121340154469. The reversal of 121340154450 is 54451043121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1166784 + ... + 1266516.

It is an arithmetic number, because the mean of its divisors is an integer number (6270077112).

Almost surely, 2^121340154450 is an apocalyptic number.

121340154450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121340154450 is an abundant number, since it is smaller than the sum of its proper divisors (179623546926).

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

121340154450 is a wasteful number, since it uses less digits than its factorization.

121340154450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107859 (or 107854 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 121340154450 its reverse (54451043121), we get a palindrome (175791197571).

The spelling of 121340154450 in words is "one hundred twenty-one billion, three hundred forty million, one hundred fifty-four thousand, four hundred fifty".