111212202111911 has 2 divisors, whose sum is σ = 111212202111912. Its totient is φ = 111212202111910.

The previous prime is 111212202111889. The next prime is 111212202112003. The reversal of 111212202111911 is 119111202212111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111212202111911 - 2⁶ = 111212202111847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111212202111011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606101055955 + 55606101055956.

It is an arithmetic number, because the mean of its divisors is an integer number (55606101055956).

Almost surely, 2^{111212202111911} is an apocalyptic number.

111212202111911 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212202111911 is an equidigital number, since it uses as much as digits as its factorization.

111212202111911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 26.

The spelling of 111212202111911 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred two million, one hundred eleven thousand, nine hundred eleven".