20001112212131 has 2 divisors, whose sum is σ = 20001112212132. Its totient is φ = 20001112212130.

The previous prime is 20001112212101. The next prime is 20001112212157. The reversal of 20001112212131 is 13121221110002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001112212131 - 2¹⁰ = 20001112211107 is a prime.

It is a super-2 number, since 2×20001112212131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20001112212101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000556106065 + 10000556106066.

It is an arithmetic number, because the mean of its divisors is an integer number (10000556106066).

Almost surely, 2^{20001112212131} is an apocalyptic number.

20001112212131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001112212131 is an equidigital number, since it uses as much as digits as its factorization.

20001112212131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20001112212131 its reverse (13121221110002), we get a palindrome (33122333322133).

The spelling of 20001112212131 in words is "twenty trillion, one billion, one hundred twelve million, two hundred twelve thousand, one hundred thirty-one".