1021332312 has 384 divisors, whose sum is σ = 3824271360. Its totient is φ = 237634560.

The previous prime is 1021332287. The next prime is 1021332317. The reversal of 1021332312 is 2132331201.

1021332312 is a `hidden beast` number, since 1 + 0 + 21 + 332 + 312 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021332317) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2666473 + ... + 2666855.

It is an arithmetic number, because the mean of its divisors is an integer number (9959040).

Almost surely, 2^1021332312 is an apocalyptic number.

1021332312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021332312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912135680).

1021332312 is an abundant number, since it is smaller than the sum of its proper divisors (2802939048).

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

1021332312 is a wasteful number, since it uses less digits than its factorization.

1021332312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 456 counting only the distinct ones).

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

The square root of 1021332312 is about 31958.2901920613. The cubic root of 1021332312 is about 1007.0607984535.

Adding to 1021332312 its reverse (2132331201), we get a palindrome (3153663513).

It can be divided in two parts, 1021 and 332312, that added together give a palindrome (333333).

The spelling of 1021332312 in words is "one billion, twenty-one million, three hundred thirty-two thousand, three hundred twelve".