1311201122 has 32 divisors (see below), whose sum is σ = 2488734720. Its totient is φ = 503228880.

The previous prime is 1311201121. The next prime is 1311201127. The reversal of 1311201122 is 2211021131.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1311201097 and 1311201106.

It is not an unprimeable number, because it can be changed into a prime (1311201121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53222 + ... + 73857.

It is an arithmetic number, because the mean of its divisors is an integer number (77772960).

Almost surely, 2^1311201122 is an apocalyptic number.

1311201122 is a deficient number, since it is larger than the sum of its proper divisors (1177533598).

1311201122 is a wasteful number, since it uses less digits than its factorization.

1311201122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127166.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1311201122 is about 36210.5112087637. The cubic root of 1311201122 is about 1094.5184936343.

Adding to 1311201122 its reverse (2211021131), we get a palindrome (3522222253).

Subtracting 1311201122 from its reverse (2211021131), we obtain a square (899820009 = 29997²).

The spelling of 1311201122 in words is "one billion, three hundred eleven million, two hundred one thousand, one hundred twenty-two".