12311221335 has 48 divisors (see below), whose sum is σ = 23346359136. Its totient is φ = 5521780992.

The previous prime is 12311221327. The next prime is 12311221343. The reversal of 12311221335 is 53312211321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12311221327) and next prime (12311221343).

It is not a de Polignac number, because 12311221335 - 2³ = 12311221327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119064 + ... + 196973.

It is an arithmetic number, because the mean of its divisors is an integer number (486382482).

Almost surely, 2^12311221335 is an apocalyptic number.

12311221335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12311221335 is a deficient number, since it is larger than the sum of its proper divisors (11035137801).

12311221335 is a wasteful number, since it uses less digits than its factorization.

12311221335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316112 (or 316105 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

Adding to 12311221335 its reverse (53312211321), we get a palindrome (65623432656).

The spelling of 12311221335 in words is "twelve billion, three hundred eleven million, two hundred twenty-one thousand, three hundred thirty-five".