10121099966 has 4 divisors (see below), whose sum is σ = 15181649952. Its totient is φ = 5060549982.

The previous prime is 10121099951. The next prime is 10121099971. The reversal of 10121099966 is 66999012101.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2530274990 + ... + 2530274993.

It is an arithmetic number, because the mean of its divisors is an integer number (3795412488).

Almost surely, 2^10121099966 is an apocalyptic number.

10121099966 is a deficient number, since it is larger than the sum of its proper divisors (5060549986).

10121099966 is an equidigital number, since it uses as much as digits as its factorization.

10121099966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060549985.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 10121099966 in words is "ten billion, one hundred twenty-one million, ninety-nine thousand, nine hundred sixty-six".