10121420666 has 16 divisors (see below), whose sum is σ = 17352430656. Its totient is φ = 4337395776.

The previous prime is 10121420663. The next prime is 10121420723. The reversal of 10121420666 is 66602412101.

It is not an unprimeable number, because it can be changed into a prime (10121420663) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 218825 + ... + 261011.

It is an arithmetic number, because the mean of its divisors is an integer number (1084526916).

Almost surely, 2^10121420666 is an apocalyptic number.

10121420666 is a deficient number, since it is larger than the sum of its proper divisors (7231009990).

10121420666 is a wasteful number, since it uses less digits than its factorization.

10121420666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59333.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 10121420666 its reverse (66602412101), we get a palindrome (76723832767).

The spelling of 10121420666 in words is "ten billion, one hundred twenty-one million, four hundred twenty thousand, six hundred sixty-six".