1221033132 has 36 divisors (see below), whose sum is σ = 3367092456. Its totient is φ = 370009920.

The previous prime is 1221033127. The next prime is 1221033167. The reversal of 1221033132 is 2313301221.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1541313 + ... + 1542104.

It is an arithmetic number, because the mean of its divisors is an integer number (93530346).

Almost surely, 2^1221033132 is an apocalyptic number.

1221033132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221033132 is an abundant number, since it is smaller than the sum of its proper divisors (2146059324).

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

1221033132 is a wasteful number, since it uses less digits than its factorization.

1221033132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3083438 (or 3083433 counting only the distinct ones).

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

The square root of 1221033132 is about 34943.2845050376. The cubic root of 1221033132 is about 1068.8312658837.

Adding to 1221033132 its reverse (2313301221), we get a palindrome (3534334353).

The spelling of 1221033132 in words is "one billion, two hundred twenty-one million, thirty-three thousand, one hundred thirty-two".