121340154500 has 24 divisors (see below), whose sum is σ = 265006898520. Its totient is φ = 48536061600.

The previous prime is 121340154487. The next prime is 121340154527. The reversal of 121340154500 is 5451043121.

It can be written as a sum of positive squares in 4 ways, for example, as 11708971264 + 109631183236 = 108208^2 + 331106^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121340154500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121339655 + ... + 121340654.

It is an arithmetic number, because the mean of its divisors is an integer number (11041954105).

Almost surely, 2^121340154500 is an apocalyptic number.

121340154500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121340154500 is an abundant number, since it is smaller than the sum of its proper divisors (143666744020).

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

121340154500 is a wasteful number, since it uses less digits than its factorization.

121340154500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242680328 (or 242680316 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 121340154500 its reverse (5451043121), we get a palindrome (126791197621).

The spelling of 121340154500 in words is "one hundred twenty-one billion, three hundred forty million, one hundred fifty-four thousand, five hundred".