121761016066 has 16 divisors (see below), whose sum is σ = 186827129856. Its totient is φ = 59499616176.

The previous prime is 121761016021. The next prime is 121761016067. The reversal of 121761016066 is 660610167121.

It is a super-3 number, since 3×121761016066³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121761016067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3560401 + ... + 3594436.

It is an arithmetic number, because the mean of its divisors is an integer number (11676695616).

Almost surely, 2^121761016066 is an apocalyptic number.

121761016066 is a deficient number, since it is larger than the sum of its proper divisors (65066113790).

121761016066 is a wasteful number, since it uses less digits than its factorization.

121761016066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7155033.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 121761016066 in words is "one hundred twenty-one billion, seven hundred sixty-one million, sixteen thousand, sixty-six".