1243204200111 has 16 divisors (see below), whose sum is σ = 1685741368320. Its totient is φ = 814735595520.

The previous prime is 1243204200107. The next prime is 1243204200137. The reversal of 1243204200111 is 1110024023421.

It is not a de Polignac number, because 1243204200111 - 2² = 1243204200107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243204200911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12564271 + ... + 12662831.

It is an arithmetic number, because the mean of its divisors is an integer number (105358835520).

Almost surely, 2^{1243204200111} is an apocalyptic number.

1243204200111 is a deficient number, since it is larger than the sum of its proper divisors (442537168209).

1243204200111 is an equidigital number, since it uses as much as digits as its factorization.

1243204200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169886.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1243204200111 its reverse (1110024023421), we get a palindrome (2353228223532).

The spelling of 1243204200111 in words is "one trillion, two hundred forty-three billion, two hundred four million, two hundred thousand, one hundred eleven".