1231400102243 has 4 divisors (see below), whose sum is σ = 1296210633960. Its totient is φ = 1166589570528.

The previous prime is 1231400102213. The next prime is 1231400102291. The reversal of 1231400102243 is 3422010041321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231400102243 - 2²² = 1231395907939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231400102213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32405265830 + ... + 32405265867.

It is an arithmetic number, because the mean of its divisors is an integer number (324052658490).

Almost surely, 2^{1231400102243} is an apocalyptic number.

1231400102243 is a deficient number, since it is larger than the sum of its proper divisors (64810531717).

1231400102243 is an equidigital number, since it uses as much as digits as its factorization.

1231400102243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64810531716.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1231400102243 its reverse (3422010041321), we get a palindrome (4653410143564).

The spelling of 1231400102243 in words is "one trillion, two hundred thirty-one billion, four hundred million, one hundred two thousand, two hundred forty-three".