999121003013 has 8 divisors (see below), whose sum is σ = 1157935006080. Its totient is φ = 844327607760.

The previous prime is 999121002973. The next prime is 999121003021. The reversal of 999121003013 is 310300121999.

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

It is not a de Polignac number, because 999121003013 - 2⁸ = 999121002757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999121003043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005151418 + ... + 1005152411.

It is an arithmetic number, because the mean of its divisors is an integer number (144741875760).

Almost surely, 2^999121003013 is an apocalyptic number.

It is an amenable number.

999121003013 is a deficient number, since it is larger than the sum of its proper divisors (158814003067).

999121003013 is a wasteful number, since it uses less digits than its factorization.

999121003013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010303907.

The product of its (nonzero) digits is 13122, while the sum is 38.

The spelling of 999121003013 in words is "nine hundred ninety-nine billion, one hundred twenty-one million, three thousand, thirteen".