121516055170 has 16 divisors (see below), whose sum is σ = 218732931000. Its totient is φ = 48605526144.

The previous prime is 121516055161. The next prime is 121516055197. The reversal of 121516055170 is 71550615121.

It can be written as a sum of positive squares in 4 ways, for example, as 62931241321 + 58584813849 = 250861^2 + 242043^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856456 + ... + 988204.

Almost surely, 2^121516055170 is an apocalyptic number.

121516055170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121516055170 is a deficient number, since it is larger than the sum of its proper divisors (97216875830).

121516055170 is a wasteful number, since it uses less digits than its factorization.

121516055170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223989.

The product of its (nonzero) digits is 10500, while the sum is 34.

The spelling of 121516055170 in words is "one hundred twenty-one billion, five hundred sixteen million, fifty-five thousand, one hundred seventy".