10011946121 has 4 divisors (see below), whose sum is σ = 10014783492. Its totient is φ = 10009108752.

The previous prime is 10011946117. The next prime is 10011946159. The reversal of 10011946121 is 12164911001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4215255625 + 5796690496 = 64925^2 + 76136^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011946121 - 2² = 10011946117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10011946111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1413386 + ... + 1420451.

It is an arithmetic number, because the mean of its divisors is an integer number (2503695873).

Almost surely, 2^10011946121 is an apocalyptic number.

It is an amenable number.

10011946121 is a deficient number, since it is larger than the sum of its proper divisors (2837371).

10011946121 is an equidigital number, since it uses as much as digits as its factorization.

10011946121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837370.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 10011946121 in words is "ten billion, eleven million, nine hundred forty-six thousand, one hundred twenty-one".