20311310421231 has 16 divisors (see below), whose sum is σ = 28259319315456. Its totient is φ = 12952091938016.

The previous prime is 20311310421229. The next prime is 20311310421239. The reversal of 20311310421231 is 13212401311302.

It is a cyclic number.

It is not a de Polignac number, because 20311310421231 - 2¹ = 20311310421229 is a prime.

It is a super-2 number, since 2×20311310421231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311310421239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33190981 + ... + 33797393.

It is an arithmetic number, because the mean of its divisors is an integer number (1766207457216).

Almost surely, 2^{20311310421231} is an apocalyptic number.

20311310421231 is a deficient number, since it is larger than the sum of its proper divisors (7948008894225).

20311310421231 is a wasteful number, since it uses less digits than its factorization.

20311310421231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091862.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20311310421231 its reverse (13212401311302), we get a palindrome (33523711732533).

The spelling of 20311310421231 in words is "twenty trillion, three hundred eleven billion, three hundred ten million, four hundred twenty-one thousand, two hundred thirty-one".