1023111021320 has 16 divisors (see below), whose sum is σ = 2301999798060. Its totient is φ = 409244408512.

The previous prime is 1023111021319. The next prime is 1023111021337. The reversal of 1023111021320 is 231201113201.

It can be written as a sum of positive squares in 2 ways, for example, as 956300144836 + 66810876484 = 977906^2 + 258478^2 .

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, 12788887727 + ... + 12788887806.

Almost surely, 2^{1023111021320} is an apocalyptic number.

1023111021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023111021320 is an abundant number, since it is smaller than the sum of its proper divisors (1278888776740).

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

1023111021320 is a wasteful number, since it uses less digits than its factorization.

1023111021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25577775544 (or 25577775540 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1023111021320 its reverse (231201113201), we get a palindrome (1254312134521).

The spelling of 1023111021320 in words is "one trillion, twenty-three billion, one hundred eleven million, twenty-one thousand, three hundred twenty".