121156532442 has 96 divisors (see below), whose sum is σ = 291072577536. Its totient is φ = 36115956000.

The previous prime is 121156532437. The next prime is 121156532491. The reversal of 121156532442 is 244235651121.

121156532442 is a `hidden beast` number, since 1 + 2 + 115 + 6 + 532 + 4 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 121156532397 and 121156532406.

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 47 ways as a sum of consecutive naturals, for example, 3059823 + ... + 3099165.

It is an arithmetic number, because the mean of its divisors is an integer number (3032006016).

Almost surely, 2^121156532442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121156532442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145536288768).

121156532442 is an abundant number, since it is smaller than the sum of its proper divisors (169916045094).

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

121156532442 is a wasteful number, since it uses less digits than its factorization.

121156532442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39616 (or 39613 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The spelling of 121156532442 in words is "one hundred twenty-one billion, one hundred fifty-six million, five hundred thirty-two thousand, four hundred forty-two".