20311331213111 has 32 divisors (see below), whose sum is σ = 22620090931200. Its totient is φ = 18157958784000.

The previous prime is 20311331213039. The next prime is 20311331213113. The reversal of 20311331213111 is 11131213311302.

It is a cyclic number.

It is not a de Polignac number, because 20311331213111 - 2³⁸ = 20036453306167 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 (20311331213113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46413935 + ... + 46849503.

It is an arithmetic number, because the mean of its divisors is an integer number (706877841600).

Almost surely, 2^{20311331213111} is an apocalyptic number.

20311331213111 is a deficient number, since it is larger than the sum of its proper divisors (2308759718089).

20311331213111 is a wasteful number, since it uses less digits than its factorization.

20311331213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437591.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 20311331213111 its reverse (11131213311302), we get a palindrome (31442544524413).

The spelling of 20311331213111 in words is "twenty trillion, three hundred eleven billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred eleven".