1020120109999 has 8 divisors (see below), whose sum is σ = 1022337866880. Its totient is φ = 1017904451616.

The previous prime is 1020120109979. The next prime is 1020120110069. The reversal of 1020120109999 is 9999010210201.

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 1020120109999 - 2⁹ = 1020120109487 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 (1020120109979) 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, 450637 + ... + 1497769.

It is an arithmetic number, because the mean of its divisors is an integer number (127792233360).

Almost surely, 2^{1020120109999} is an apocalyptic number.

1020120109999 is a deficient number, since it is larger than the sum of its proper divisors (2217756881).

1020120109999 is a wasteful number, since it uses less digits than its factorization.

1020120109999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049249.

The product of its (nonzero) digits is 26244, while the sum is 43.

The spelling of 1020120109999 in words is "one trillion, twenty billion, one hundred twenty million, one hundred nine thousand, nine hundred ninety-nine".