1021232545320 has 256 divisors, whose sum is σ = 3334816396800. Its totient is φ = 248683622400.

The previous prime is 1021232545313. The next prime is 1021232545321. The reversal of 1021232545320 is 235452321201.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1021232545321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 281873029 + ... + 281876651.

It is an arithmetic number, because the mean of its divisors is an integer number (13026626550).

Almost surely, 2^{1021232545320} is an apocalyptic number.

1021232545320 is a gapful number since it is divisible by the number (10) 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 1021232545320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667408198400).

1021232545320 is an abundant number, since it is smaller than the sum of its proper divisors (2313583851480).

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

1021232545320 is a wasteful number, since it uses less digits than its factorization.

1021232545320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540 (or 5536 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 1021232545320 its reverse (235452321201), we get a palindrome (1256684866521).

The spelling of 1021232545320 in words is "one trillion, twenty-one billion, two hundred thirty-two million, five hundred forty-five thousand, three hundred twenty".