1021203320 has 16 divisors (see below), whose sum is σ = 2297707560. Its totient is φ = 408481312.

The previous prime is 1021203319. The next prime is 1021203341. The reversal of 1021203320 is 233021201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021203295 and 1021203304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12765002 + ... + 12765081.

Almost surely, 2^1021203320 is an apocalyptic number.

1021203320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021203320 is an abundant number, since it is smaller than the sum of its proper divisors (1276504240).

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

1021203320 is a wasteful number, since it uses less digits than its factorization.

1021203320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25530094 (or 25530090 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1021203320 is about 31956.2719978410. The cubic root of 1021203320 is about 1007.0184001553.

Adding to 1021203320 its reverse (233021201), we get a palindrome (1254224521).

The spelling of 1021203320 in words is "one billion, twenty-one million, two hundred three thousand, three hundred twenty".