1243031012403 has 32 divisors (see below), whose sum is σ = 1703863910400. Its totient is φ = 805689672480.

The previous prime is 1243031012393. The next prime is 1243031012449. The reversal of 1243031012403 is 3042101303421.

It is a happy number.

It is not a de Polignac number, because 1243031012403 - 2⁵ = 1243031012371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243031012303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17670126 + ... + 17740332.

It is an arithmetic number, because the mean of its divisors is an integer number (53245747200).

Almost surely, 2^{1243031012403} is an apocalyptic number.

1243031012403 is a deficient number, since it is larger than the sum of its proper divisors (460832897997).

1243031012403 is a wasteful number, since it uses less digits than its factorization.

1243031012403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71087.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1243031012403 its reverse (3042101303421), we get a palindrome (4285132315824).

The spelling of 1243031012403 in words is "one trillion, two hundred forty-three billion, thirty-one million, twelve thousand, four hundred three".