10120121009999 has 48 divisors (see below), whose sum is σ = 13982087261184. Its totient is φ = 7124330790720.

The previous prime is 10120121009989. The next prime is 10120121010049. The reversal of 10120121009999 is 99990012102101.

It is not a de Polignac number, because 10120121009999 - 2⁸ = 10120121009743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120121009989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9260057 + ... + 10295090.

It is an arithmetic number, because the mean of its divisors is an integer number (291293484608).

Almost surely, 2^{10120121009999} is an apocalyptic number.

10120121009999 is a deficient number, since it is larger than the sum of its proper divisors (3861966251185).

10120121009999 is a wasteful number, since it uses less digits than its factorization.

10120121009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19555236 (or 19555225 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 10120121009999 in words is "ten trillion, one hundred twenty billion, one hundred twenty-one million, nine thousand, nine hundred ninety-nine".