121560622666 has 48 divisors (see below), whose sum is σ = 215211297600. Its totient is φ = 51336680640.

The previous prime is 121560622619. The next prime is 121560622681. The reversal of 121560622666 is 666226065121.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 18776406 + ... + 18782878.

It is an arithmetic number, because the mean of its divisors is an integer number (4483568700).

Almost surely, 2^121560622666 is an apocalyptic number.

121560622666 is a deficient number, since it is larger than the sum of its proper divisors (93650674934).

121560622666 is a wasteful number, since it uses less digits than its factorization.

121560622666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9259 (or 9252 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

Adding to 121560622666 its reverse (666226065121), we get a palindrome (787786687787).

The spelling of 121560622666 in words is "one hundred twenty-one billion, five hundred sixty million, six hundred twenty-two thousand, six hundred sixty-six".