12021132330 has 24 divisors (see below), whose sum is σ = 31254944292. Its totient is φ = 3205635264.

The previous prime is 12021132311. The next prime is 12021132337. The reversal of 12021132330 is 3323112021.

12021132330 is a `hidden beast` number, since 1 + 202 + 1 + 132 + 330 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12018517641 + 2614689 = 109629^2 + 1617^2 .

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 (12021132337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66783979 + ... + 66784158.

Almost surely, 2^12021132330 is an apocalyptic number.

12021132330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021132330 is an abundant number, since it is smaller than the sum of its proper divisors (19233811962).

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

12021132330 is a wasteful number, since it uses less digits than its factorization.

12021132330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133568150 (or 133568147 counting only the distinct ones).

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

Adding to 12021132330 its reverse (3323112021), we get a palindrome (15344244351).

The spelling of 12021132330 in words is "twelve billion, twenty-one million, one hundred thirty-two thousand, three hundred thirty".