20213213331131 has 2 divisors, whose sum is σ = 20213213331132. Its totient is φ = 20213213331130.

The previous prime is 20213213331097. The next prime is 20213213331173. The reversal of 20213213331131 is 13113331231202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20213213331131 - 2⁶ = 20213213331067 is a prime.

It is a super-2 number, since 2×20213213331131² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20213213331131.

It is not a weakly prime, because it can be changed into another prime (20213213331191) 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 as a sum of consecutive naturals, namely, 10106606665565 + 10106606665566.

It is an arithmetic number, because the mean of its divisors is an integer number (10106606665566).

Almost surely, 2^{20213213331131} is an apocalyptic number.

20213213331131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213213331131 is an equidigital number, since it uses as much as digits as its factorization.

20213213331131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 20213213331131 its reverse (13113331231202), we get a palindrome (33326544562333).

The spelling of 20213213331131 in words is "twenty trillion, two hundred thirteen billion, two hundred thirteen million, three hundred thirty-one thousand, one hundred thirty-one".