1243340200106 has 4 divisors (see below), whose sum is σ = 1865010300162. Its totient is φ = 621670100052.

The previous prime is 1243340200057. The next prime is 1243340200153. The reversal of 1243340200106 is 6010020433421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1238637669481 + 4702530625 = 1112941^2 + 68575^2 .

It is a super-2 number, since 2×1243340200106² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310835050025 + ... + 310835050028.

Almost surely, 2^{1243340200106} is an apocalyptic number.

1243340200106 is a deficient number, since it is larger than the sum of its proper divisors (621670100056).

1243340200106 is an equidigital number, since it uses as much as digits as its factorization.

1243340200106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621670100055.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 1243340200106 its reverse (6010020433421), we get a palindrome (7253360633527).

The spelling of 1243340200106 in words is "one trillion, two hundred forty-three billion, three hundred forty million, two hundred thousand, one hundred six".