11101111121211 has 16 divisors (see below), whose sum is σ = 15201626474784. Its totient is φ = 7200671019264.

The previous prime is 11101111121161. The next prime is 11101111121341. The reversal of 11101111121211 is 11212111110111.

It is a happy number.

It is not a de Polignac number, because 11101111121211 - 2⁶ = 11101111121147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11101111121411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22714455 + ... + 23198031.

It is an arithmetic number, because the mean of its divisors is an integer number (950101654674).

Almost surely, 2^{11101111121211} is an apocalyptic number.

11101111121211 is a deficient number, since it is larger than the sum of its proper divisors (4100515353573).

11101111121211 is a wasteful number, since it uses less digits than its factorization.

11101111121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690430.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 11101111121211 its reverse (11212111110111), we get a palindrome (22313222231322).

It can be divided in two parts, 1110111 and 1121211, that multiplied together give a palindrome (1244668664421).

The spelling of 11101111121211 in words is "eleven trillion, one hundred one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".