1243121224402 has 8 divisors (see below), whose sum is σ = 1974369003516. Its totient is φ = 584998223232.

The previous prime is 1243121224357. The next prime is 1243121224417. The reversal of 1243121224402 is 2044221213421.

It can be written as a sum of positive squares in 2 ways, for example, as 1233518988321 + 9602236081 = 1110639^2 + 97991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18281194443 + ... + 18281194510.

Almost surely, 2^{1243121224402} is an apocalyptic number.

1243121224402 is a deficient number, since it is larger than the sum of its proper divisors (731247779114).

1243121224402 is a wasteful number, since it uses less digits than its factorization.

1243121224402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36562388972.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1243121224402 its reverse (2044221213421), we get a palindrome (3287342437823).

The spelling of 1243121224402 in words is "one trillion, two hundred forty-three billion, one hundred twenty-one million, two hundred twenty-four thousand, four hundred two".