10121201999 has 8 divisors (see below), whose sum is σ = 10251141120. Its totient is φ = 9991308600.

The previous prime is 10121201971. The next prime is 10121202053. The reversal of 10121201999 is 99910212101.

10121201999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 10121201999 - 2³² = 5826234703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121201099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792434 + ... + 805104.

It is an arithmetic number, because the mean of its divisors is an integer number (1281392640).

Almost surely, 2^10121201999 is an apocalyptic number.

10121201999 is a deficient number, since it is larger than the sum of its proper divisors (129939121).

10121201999 is a wasteful number, since it uses less digits than its factorization.

10121201999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22861.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 10121201999 in words is "ten billion, one hundred twenty-one million, two hundred one thousand, nine hundred ninety-nine".