1311240532240 has 20 divisors (see below), whose sum is σ = 3048634237644. Its totient is φ = 524496212864.

The previous prime is 1311240532171. The next prime is 1311240532313. The reversal of 1311240532240 is 422350421131.

It can be written as a sum of positive squares in 2 ways, for example, as 212793999616 + 1098446532624 = 461296^2 + 1048068^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1311240532199 and 1311240532208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8195253247 + ... + 8195253406.

Almost surely, 2^{1311240532240} is an apocalyptic number.

1311240532240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311240532240 is an abundant number, since it is smaller than the sum of its proper divisors (1737393705404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311240532240 is a wasteful number, since it uses less digits than its factorization.

1311240532240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16390506666 (or 16390506660 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1311240532240 its reverse (422350421131), we get a palindrome (1733590953371).

The spelling of 1311240532240 in words is "one trillion, three hundred eleven billion, two hundred forty million, five hundred thirty-two thousand, two hundred forty".