20001213210331 has 8 divisors (see below), whose sum is σ = 20402208305280. Its totient is φ = 19601092697472.

The previous prime is 20001213210323. The next prime is 20001213210431. The reversal of 20001213210331 is 13301231210002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001213210331 - 2³ = 20001213210323 is a prime.

It is a super-2 number, since 2×20001213210331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001213210299 and 20001213210308.

It is not an unprimeable number, because it can be changed into a prime (20001213210131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218599326 + ... + 218690803.

It is an arithmetic number, because the mean of its divisors is an integer number (2550276038160).

Almost surely, 2^{20001213210331} is an apocalyptic number.

20001213210331 is a deficient number, since it is larger than the sum of its proper divisors (400995094949).

20001213210331 is an equidigital number, since it uses as much as digits as its factorization.

20001213210331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437291045.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20001213210331 its reverse (13301231210002), we get a palindrome (33302444420333).

The spelling of 20001213210331 in words is "twenty trillion, one billion, two hundred thirteen million, two hundred ten thousand, three hundred thirty-one".