1311142204250 has 16 divisors (see below), whose sum is σ = 2454458206824. Its totient is φ = 524456881600.

The previous prime is 1311142204247. The next prime is 1311142204259. The reversal of 1311142204250 is 524022411131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 299912855449 + 1011229348801 = 547643^2 + 1005599^2 .

It is not an unprimeable number, because it can be changed into a prime (1311142204259) 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, 2622284159 + ... + 2622284658.

Almost surely, 2^{1311142204250} is an apocalyptic number.

1311142204250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311142204250 is a deficient number, since it is larger than the sum of its proper divisors (1143316002574).

1311142204250 is an equidigital number, since it uses as much as digits as its factorization.

1311142204250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244568834 (or 5244568824 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1311142204250 its reverse (524022411131), we get a palindrome (1835164615381).

The spelling of 1311142204250 in words is "one trillion, three hundred eleven billion, one hundred forty-two million, two hundred four thousand, two hundred fifty".