20331031321111 has 16 divisors (see below), whose sum is σ = 23864100344320. Its totient is φ = 16955146968480.

The previous prime is 20331031321103. The next prime is 20331031321177. The reversal of 20331031321111 is 11112313013302.

It is not a de Polignac number, because 20331031321111 - 2³ = 20331031321103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331031321511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8619646 + ... + 10721956.

It is an arithmetic number, because the mean of its divisors is an integer number (1491506271520).

Almost surely, 2^{20331031321111} is an apocalyptic number.

20331031321111 is a deficient number, since it is larger than the sum of its proper divisors (3533069023209).

20331031321111 is a wasteful number, since it uses less digits than its factorization.

20331031321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139694.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 20331031321111 its reverse (11112313013302), we get a palindrome (31443344334413).

The spelling of 20331031321111 in words is "twenty trillion, three hundred thirty-one billion, thirty-one million, three hundred twenty-one thousand, one hundred eleven".