1243103031311 has 8 divisors (see below), whose sum is σ = 1258961944320. Its totient is φ = 1227247204248.

The previous prime is 1243103031281. The next prime is 1243103031323. The reversal of 1243103031311 is 1131303013421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243103031311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243103031361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44780 + ... + 1577406.

It is an arithmetic number, because the mean of its divisors is an integer number (157370243040).

Almost surely, 2^{1243103031311} is an apocalyptic number.

1243103031311 is a deficient number, since it is larger than the sum of its proper divisors (15858913009).

1243103031311 is a wasteful number, since it uses less digits than its factorization.

1243103031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542973.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1243103031311 its reverse (1131303013421), we get a palindrome (2374406044732).

The spelling of 1243103031311 in words is "one trillion, two hundred forty-three billion, one hundred three million, thirty-one thousand, three hundred eleven".