20000111201131 has 2 divisors, whose sum is σ = 20000111201132. Its totient is φ = 20000111201130.

The previous prime is 20000111201069. The next prime is 20000111201201. The reversal of 20000111201131 is 13110211100002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000111201131 is a prime.

It is a super-2 number, since 2×20000111201131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20000111202131) 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, 10000055600565 + 10000055600566.

It is an arithmetic number, because the mean of its divisors is an integer number (10000055600566).

Almost surely, 2^{20000111201131} is an apocalyptic number.

20000111201131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000111201131 is an equidigital number, since it uses as much as digits as its factorization.

20000111201131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20000111201131 its reverse (13110211100002), we get a palindrome (33110322301133).

The spelling of 20000111201131 in words is "twenty trillion, one hundred eleven million, two hundred one thousand, one hundred thirty-one".