1230213123 has 8 divisors (see below), whose sum is σ = 1822538000. Its totient is φ = 820142064.

The previous prime is 1230213079. The next prime is 1230213137. The reversal of 1230213123 is 3213120321.

It is not a de Polignac number, because 1230213123 - 2⁹ = 1230212611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230213096 and 1230213105.

It is not an unprimeable number, because it can be changed into a prime (1230214123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22781698 + ... + 22781751.

It is an arithmetic number, because the mean of its divisors is an integer number (227817250).

Almost surely, 2^1230213123 is an apocalyptic number.

1230213123 is a deficient number, since it is larger than the sum of its proper divisors (592324877).

1230213123 is an equidigital number, since it uses as much as digits as its factorization.

1230213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45563458 (or 45563452 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1230213123 is about 35074.3941216381. The cubic root of 1230213123 is about 1071.5031492545.

Adding to 1230213123 its reverse (3213120321), we get a palindrome (4443333444).

It can be divided in two parts, 12302 and 13123, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 1230213123 in words is "one billion, two hundred thirty million, two hundred thirteen thousand, one hundred twenty-three".