121530115242 has 48 divisors (see below), whose sum is σ = 277596446400. Its totient is φ = 38349248256.

The previous prime is 121530115171. The next prime is 121530115249. The reversal of 121530115242 is 242511035121.

It is a happy number.

121530115242 is a `hidden beast` number, since 12 + 1 + 530 + 115 + 2 + 4 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (121530115249) by changing a digit.

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, 1472992 + ... + 1553307.

It is an arithmetic number, because the mean of its divisors is an integer number (5783259300).

Almost surely, 2^121530115242 is an apocalyptic number.

121530115242 is an abundant number, since it is smaller than the sum of its proper divisors (156066331158).

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

121530115242 is a wasteful number, since it uses less digits than its factorization.

121530115242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026427 (or 3026424 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 121530115242 in words is "one hundred twenty-one billion, five hundred thirty million, one hundred fifteen thousand, two hundred forty-two".