121606952545 has 16 divisors (see below), whose sum is σ = 159306395472. Its totient is φ = 88571888640.

The previous prime is 121606952521. The next prime is 121606952557. The reversal of 121606952545 is 545259606121.

It can be written as a sum of positive squares in 8 ways, for example, as 28845285921 + 92761666624 = 169839^2 + 304568^2 .

It is not a de Polignac number, because 121606952545 - 2¹¹ = 121606950497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121606952495 and 121606952504.

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, 12809476 + ... + 12818965.

It is an arithmetic number, because the mean of its divisors is an integer number (9956649717).

Almost surely, 2^121606952545 is an apocalyptic number.

It is an amenable number.

121606952545 is a deficient number, since it is larger than the sum of its proper divisors (37699442927).

121606952545 is a wasteful number, since it uses less digits than its factorization.

121606952545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25628532.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 121606952545 in words is "one hundred twenty-one billion, six hundred six million, nine hundred fifty-two thousand, five hundred forty-five".