121776661006 has 96 divisors (see below), whose sum is σ = 247342717440. Its totient is φ = 43755370560.

The previous prime is 121776661001. The next prime is 121776661007. The reversal of 121776661006 is 600166677121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121776661001) 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 in 47 ways as a sum of consecutive naturals, for example, 34330525 + ... + 34334071.

It is an arithmetic number, because the mean of its divisors is an integer number (2576486640).

Almost surely, 2^121776661006 is an apocalyptic number.

121776661006 is an abundant number, since it is smaller than the sum of its proper divisors (125566056434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121776661006 is a wasteful number, since it uses less digits than its factorization.

121776661006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150 (or 5139 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 121776661006 in words is "one hundred twenty-one billion, seven hundred seventy-six million, six hundred sixty-one thousand, six".