121012099966 has 8 divisors (see below), whose sum is σ = 181540454760. Its totient is φ = 60498615048.

The previous prime is 121012099963. The next prime is 121012099993. The reversal of 121012099966 is 669990210121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012099961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3697101 + ... + 3729688.

It is an arithmetic number, because the mean of its divisors is an integer number (22692556845).

Almost surely, 2^121012099966 is an apocalyptic number.

121012099966 is a deficient number, since it is larger than the sum of its proper divisors (60528354794).

121012099966 is an equidigital number, since it uses as much as digits as its factorization.

121012099966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7434938.

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 121012099966 in words is "one hundred twenty-one billion, twelve million, ninety-nine thousand, nine hundred sixty-six".