1243312001345 has 16 divisors (see below), whose sum is σ = 1570575000000. Its totient is φ = 942254244288.

The previous prime is 1243312001293. The next prime is 1243312001353. The reversal of 1243312001345 is 5431002133421.

It is a cyclic number.

It is not a de Polignac number, because 1243312001345 - 2²⁸ = 1243043565889 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1738031 + ... + 2346779.

It is an arithmetic number, because the mean of its divisors is an integer number (98160937500).

Almost surely, 2^{1243312001345} is an apocalyptic number.

It is an amenable number.

1243312001345 is a deficient number, since it is larger than the sum of its proper divisors (327262998655).

1243312001345 is a wasteful number, since it uses less digits than its factorization.

1243312001345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630272.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 1243312001345 its reverse (5431002133421), we get a palindrome (6674314134766).

The spelling of 1243312001345 in words is "one trillion, two hundred forty-three billion, three hundred twelve million, one thousand, three hundred forty-five".