1023320031220 has 12 divisors (see below), whose sum is σ = 2148972065604. Its totient is φ = 409328012480.

The previous prime is 1023320031211. The next prime is 1023320031221. The reversal of 1023320031220 is 221300233201.

It can be written as a sum of positive squares in 2 ways, for example, as 686766893796 + 336553137424 = 828714^2 + 580132^2 .

It is a super-2 number, since 2×1023320031220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023320031221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25583000761 + ... + 25583000800.

It is an arithmetic number, because the mean of its divisors is an integer number (179081005467).

Almost surely, 2^{1023320031220} is an apocalyptic number.

1023320031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023320031220 is an abundant number, since it is smaller than the sum of its proper divisors (1125652034384).

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

1023320031220 is a wasteful number, since it uses less digits than its factorization.

1023320031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51166001570 (or 51166001568 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 1023320031220 its reverse (221300233201), we get a palindrome (1244620264421).

The spelling of 1023320031220 in words is "one trillion, twenty-three billion, three hundred twenty million, thirty-one thousand, two hundred twenty".