1000120213123 has 16 divisors (see below), whose sum is σ = 1009125596160. Its totient is φ = 991162368000.

The previous prime is 1000120213111. The next prime is 1000120213247. The reversal of 1000120213123 is 3213120210001.

It is a cyclic number.

It is not a de Polignac number, because 1000120213123 - 2¹⁷ = 1000120082051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000120213097 and 1000120213106.

It is not an unprimeable number, because it can be changed into a prime (1000120213523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71282473 + ... + 71296501.

It is an arithmetic number, because the mean of its divisors is an integer number (63070349760).

Almost surely, 2^{1000120213123} is an apocalyptic number.

1000120213123 is a deficient number, since it is larger than the sum of its proper divisors (9005383037).

1000120213123 is a wasteful number, since it uses less digits than its factorization.

1000120213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15678.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1000120213123 its reverse (3213120210001), we get a palindrome (4213240423124).

The spelling of 1000120213123 in words is "one trillion, one hundred twenty million, two hundred thirteen thousand, one hundred twenty-three".