121942085602 has 4 divisors (see below), whose sum is σ = 182913128406. Its totient is φ = 60971042800.

The previous prime is 121942085597. The next prime is 121942085609. The reversal of 121942085602 is 206580249121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 113212733841 + 8729351761 = 336471^2 + 93431^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (121942085609) 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 as a sum of consecutive naturals, namely, 30485521399 + ... + 30485521402.

Almost surely, 2^121942085602 is an apocalyptic number.

121942085602 is a deficient number, since it is larger than the sum of its proper divisors (60971042804).

121942085602 is an equidigital number, since it uses as much as digits as its factorization.

121942085602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60971042803.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 121942085602 in words is "one hundred twenty-one billion, nine hundred forty-two million, eighty-five thousand, six hundred two".