1023211320 has 64 divisors (see below), whose sum is σ = 3152610720. Its totient is φ = 265480704.

The previous prime is 1023211307. The next prime is 1023211339. The reversal of 1023211320 is 231123201.

It is a super-2 number, since 2×1023211320² = 2093922810752284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1023211320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110787 + ... + 119666.

Almost surely, 2^1023211320 is an apocalyptic number.

1023211320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023211320 is an abundant number, since it is smaller than the sum of its proper divisors (2129399400).

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

1023211320 is a wasteful number, since it uses less digits than its factorization.

1023211320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230504 (or 230500 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1023211320 is about 31987.6745012825. The cubic root of 1023211320 is about 1007.6780040433.

Adding to 1023211320 its reverse (231123201), we get a palindrome (1254334521).

The spelling of 1023211320 in words is "one billion, twenty-three million, two hundred eleven thousand, three hundred twenty".