12103030402 has 4 divisors (see below), whose sum is σ = 18154545606. Its totient is φ = 6051515200.

The previous prime is 12103030393. The next prime is 12103030409. The reversal of 12103030402 is 20403030121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20403030121 = 41 ⋅497634881.

It can be written as a sum of positive squares in only one way, i.e., 7862546241 + 4240484161 = 88671^2 + 65119^2 .

It is not an unprimeable number, because it can be changed into a prime (12103030409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3025757599 + ... + 3025757602.

Almost surely, 2^12103030402 is an apocalyptic number.

12103030402 is a deficient number, since it is larger than the sum of its proper divisors (6051515204).

12103030402 is an equidigital number, since it uses as much as digits as its factorization.

12103030402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051515203.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12103030402 its reverse (20403030121), we get a palindrome (32506060523).

The spelling of 12103030402 in words is "twelve billion, one hundred three million, thirty thousand, four hundred two".