1021234320 has 120 divisors (see below), whose sum is σ = 3435407352. Its totient is φ = 271872000.

The previous prime is 1021234297. The next prime is 1021234349. The reversal of 1021234320 is 234321201.

It can be written as a sum of positive squares in 4 ways, for example, as 38787984 + 982446336 = 6228^2 + 31344^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a junction number, because it is equal to n+sod(n) for n = 1021234293 and 1021234302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 849720 + ... + 850920.

Almost surely, 2^1021234320 is an apocalyptic number.

1021234320 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 1021234320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1717703676).

1021234320 is an abundant number, since it is smaller than the sum of its proper divisors (2414173032).

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

1021234320 is a wasteful number, since it uses less digits than its factorization.

1021234320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401 (or 2392 counting only the distinct ones).

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

The square root of 1021234320 is about 31956.7570319643. The cubic root of 1021234320 is about 1007.0285898514.

Adding to 1021234320 its reverse (234321201), we get a palindrome (1255555521).

The spelling of 1021234320 in words is "one billion, twenty-one million, two hundred thirty-four thousand, three hundred twenty".