1311222132 has 72 divisors (see below), whose sum is σ = 3713560032. Its totient is φ = 386596800.

The previous prime is 1311222119. The next prime is 1311222161. The reversal of 1311222132 is 2312221131.

1311222132 is a `hidden beast` number, since 1 + 311 + 222 + 132 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30094 + ... + 59397.

Almost surely, 2^1311222132 is an apocalyptic number.

1311222132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311222132 is an abundant number, since it is smaller than the sum of its proper divisors (2402337900).

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

1311222132 is a wasteful number, since it uses less digits than its factorization.

1311222132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89549 (or 89544 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1311222132 is about 36210.8013167342. The cubic root of 1311222132 is about 1094.5243396001.

Adding to 1311222132 its reverse (2312221131), we get a palindrome (3623443263).

The spelling of 1311222132 in words is "one billion, three hundred eleven million, two hundred twenty-two thousand, one hundred thirty-two".