1311222332405 has 4 divisors (see below), whose sum is σ = 1573466798892. Its totient is φ = 1048977865920.

The previous prime is 1311222332393. The next prime is 1311222332417. The reversal of 1311222332405 is 5042332221131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1311222332393) and next prime (1311222332417).

It can be written as a sum of positive squares in 2 ways, for example, as 228095073649 + 1083127258756 = 477593^2 + 1040734^2 .

It is not a de Polignac number, because 1311222332405 - 2⁴ = 1311222332389 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 131122233236 + ... + 131122233245.

It is an arithmetic number, because the mean of its divisors is an integer number (393366699723).

Almost surely, 2^{1311222332405} is an apocalyptic number.

It is an amenable number.

1311222332405 is a deficient number, since it is larger than the sum of its proper divisors (262244466487).

1311222332405 is an equidigital number, since it uses as much as digits as its factorization.

1311222332405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262244466486.

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

Adding to 1311222332405 its reverse (5042332221131), we get a palindrome (6353554553536).

The spelling of 1311222332405 in words is "one trillion, three hundred eleven billion, two hundred twenty-two million, three hundred thirty-two thousand, four hundred five".