121605745142 has 32 divisors (see below), whose sum is σ = 222754847040. Its totient is φ = 48601036800.

The previous prime is 121605745127. The next prime is 121605745187. The reversal of 121605745142 is 241547506121.

It is a junction number, because it is equal to n+sod(n) for n = 121605745096 and 121605745105.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2317859 + ... + 2369742.

It is an arithmetic number, because the mean of its divisors is an integer number (6961088970).

Almost surely, 2^121605745142 is an apocalyptic number.

121605745142 is a deficient number, since it is larger than the sum of its proper divisors (101149101898).

121605745142 is a wasteful number, since it uses less digits than its factorization.

121605745142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687736.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 121605745142 in words is "one hundred twenty-one billion, six hundred five million, seven hundred forty-five thousand, one hundred forty-two".