20111100111967 has 2 divisors, whose sum is σ = 20111100111968. Its totient is φ = 20111100111966.

The previous prime is 20111100111923. The next prime is 20111100112063. The reversal of 20111100111967 is 76911100111102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20111100111967 - 2¹⁵ = 20111100079199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111100111917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055550055983 + 10055550055984.

It is an arithmetic number, because the mean of its divisors is an integer number (10055550055984).

Almost surely, 2^{20111100111967} is an apocalyptic number.

20111100111967 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111100111967 is an equidigital number, since it uses as much as digits as its factorization.

20111100111967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 31.

The spelling of 20111100111967 in words is "twenty trillion, one hundred eleven billion, one hundred million, one hundred eleven thousand, nine hundred sixty-seven".