20011111141111 has 2 divisors, whose sum is σ = 20011111141112. Its totient is φ = 20011111141110.

The previous prime is 20011111141009. The next prime is 20011111141117. The reversal of 20011111141111 is 11114111111002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011111141111 - 2³⁷ = 19873672187639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011111141117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005555570555 + 10005555570556.

It is an arithmetic number, because the mean of its divisors is an integer number (10005555570556).

Almost surely, 2^{20011111141111} is an apocalyptic number.

20011111141111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011111141111 is an equidigital number, since it uses as much as digits as its factorization.

20011111141111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 20011111141111 its reverse (11114111111002), we get a palindrome (31125222252113).

The spelling of 20011111141111 in words is "twenty trillion, eleven billion, one hundred eleven million, one hundred forty-one thousand, one hundred eleven".