1220133132 has 42 divisors (see below), whose sum is σ = 3201392628. Its totient is φ = 406710072.

The previous prime is 1220133071. The next prime is 1220133133. The reversal of 1220133132 is 2313310221.

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

It is not an unprimeable number, because it can be changed into a prime (1220133133) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 206298 + ... + 212129.

It is an arithmetic number, because the mean of its divisors is an integer number (76223634).

Almost surely, 2^1220133132 is an apocalyptic number.

1220133132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220133132 is an abundant number, since it is smaller than the sum of its proper divisors (1981259496).

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

1220133132 is an equidigital number, since it uses as much as digits as its factorization.

1220133132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418449 (or 418432 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1220133132 is about 34930.4041201931. The cubic root of 1220133132 is about 1068.5685963581.

Adding to 1220133132 its reverse (2313310221), we get a palindrome (3533443353).

The spelling of 1220133132 in words is "one billion, two hundred twenty million, one hundred thirty-three thousand, one hundred thirty-two".