1021223232 has 84 divisors (see below), whose sum is σ = 2936395956. Its totient is φ = 339333120.

The previous prime is 1021223219. The next prime is 1021223237. The reversal of 1021223232 is 2323221201.

It can be written as a sum of positive squares in 2 ways, for example, as 518746176 + 502477056 = 22776^2 + 22416^2 .

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 (1021223237) 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, 191482 + ... + 196742.

Almost surely, 2^1021223232 is an apocalyptic number.

1021223232 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 1021223232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468197978).

1021223232 is an abundant number, since it is smaller than the sum of its proper divisors (1915172724).

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

1021223232 is a wasteful number, since it uses less digits than its factorization.

1021223232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616 (or 5603 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1021223232 is about 31956.5835470565. The cubic root of 1021223232 is about 1007.0249452509.

Adding to 1021223232 its reverse (2323221201), we get a palindrome (3344444433).

The spelling of 1021223232 in words is "one billion, twenty-one million, two hundred twenty-three thousand, two hundred thirty-two".