12240646402 has 4 divisors (see below), whose sum is σ = 18360969606. Its totient is φ = 6120323200.

The previous prime is 12240646399. The next prime is 12240646403. The reversal of 12240646402 is 20464604221.

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: 20464604221 = 383 ⋅53432387.

It can be written as a sum of positive squares in only one way, i.e., 10298393361 + 1942253041 = 101481^2 + 44071^2 .

It is not an unprimeable number, because it can be changed into a prime (12240646403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060161599 + ... + 3060161602.

Almost surely, 2^12240646402 is an apocalyptic number.

12240646402 is a deficient number, since it is larger than the sum of its proper divisors (6120323204).

12240646402 is an equidigital number, since it uses as much as digits as its factorization.

12240646402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120323203.

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 12240646402 in words is "twelve billion, two hundred forty million, six hundred forty-six thousand, four hundred two".