20031000213321 has 12 divisors (see below), whose sum is σ = 28934053665348. Its totient is φ = 13353821669664.

The previous prime is 20031000213311. The next prime is 20031000213379. The reversal of 20031000213321 is 12331200013002.

20031000213321 is a `hidden beast` number, since 2 + 0 + 0 + 310 + 0 + 0 + 21 + 332 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15294004670025 + 4736995543296 = 3910755^2 + 2176464^2 .

It is not a de Polignac number, because 20031000213321 - 2¹⁸ = 20030999951177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20031000213294 and 20031000213303.

It is not an unprimeable number, because it can be changed into a prime (20031000213311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14160090 + ... + 15510323.

It is an arithmetic number, because the mean of its divisors is an integer number (2411171138779).

Almost surely, 2^{20031000213321} is an apocalyptic number.

It is an amenable number.

20031000213321 is a deficient number, since it is larger than the sum of its proper divisors (8903053452027).

20031000213321 is a wasteful number, since it uses less digits than its factorization.

20031000213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29745432 (or 29745429 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20031000213321 its reverse (12331200013002), we get a palindrome (32362200226323).

The spelling of 20031000213321 in words is "twenty trillion, thirty-one billion, two hundred thirteen thousand, three hundred twenty-one".