1010020003123 has 4 divisors (see below), whose sum is σ = 1029076984368. Its totient is φ = 990963021880.

The previous prime is 1010020003093. The next prime is 1010020003189. The reversal of 1010020003123 is 3213000200101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010020003123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1010020003193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9528490543 + ... + 9528490648.

It is an arithmetic number, because the mean of its divisors is an integer number (257269246092).

Almost surely, 2^{1010020003123} is an apocalyptic number.

1010020003123 is a deficient number, since it is larger than the sum of its proper divisors (19056981245).

1010020003123 is an equidigital number, since it uses as much as digits as its factorization.

1010020003123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19056981244.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 1010020003123 its reverse (3213000200101), we get a palindrome (4223020203224).

The spelling of 1010020003123 in words is "one trillion, ten billion, twenty million, three thousand, one hundred twenty-three".