121640256116 has 12 divisors (see below), whose sum is σ = 216886872132. Its totient is φ = 59672578368.

The previous prime is 121640256103. The next prime is 121640256131. The reversal of 121640256116 is 611652046121.

It can be written as a sum of positive squares in 2 ways, for example, as 88953062500 + 32687193616 = 298250^2 + 180796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286887185 + ... + 286887608.

It is an arithmetic number, because the mean of its divisors is an integer number (18073906011).

Almost surely, 2^121640256116 is an apocalyptic number.

It is an amenable number.

121640256116 is a deficient number, since it is larger than the sum of its proper divisors (95246616016).

121640256116 is a wasteful number, since it uses less digits than its factorization.

121640256116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573774850 (or 573774848 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 121640256116 in words is "one hundred twenty-one billion, six hundred forty million, two hundred fifty-six thousand, one hundred sixteen".