1321133110020 has 72 divisors (see below), whose sum is σ = 4218354853440. Its totient is φ = 333759942720.

The previous prime is 1321133110019. The next prime is 1321133110051. The reversal of 1321133110020 is 200113311231.

1321133110020 is a `hidden beast` number, since 1 + 3 + 211 + 331 + 100 + 20 = 666.

It is a super-3 number, since 3×1321133110020³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 = 1321133109975 and 1321133110002.

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, 193144696 + ... + 193151535.

Almost surely, 2^{1321133110020} is an apocalyptic number.

1321133110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321133110020 is an abundant number, since it is smaller than the sum of its proper divisors (2897221743420).

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

1321133110020 is a wasteful number, since it uses less digits than its factorization.

1321133110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386296265 (or 386296260 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1321133110020 its reverse (200113311231), we get a palindrome (1521246421251).

The spelling of 1321133110020 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-three million, one hundred ten thousand, twenty".