1111212101111 has 32 divisors (see below), whose sum is σ = 1328324849280. Its totient is φ = 909441792000.

The previous prime is 1111212101101. The next prime is 1111212101117. The reversal of 1111212101111 is 1111012121111.

It is not a de Polignac number, because 1111212101111 - 2²⁶ = 1111144992247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111212101117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17539451 + ... + 17602691.

It is an arithmetic number, because the mean of its divisors is an integer number (41510151540).

Almost surely, 2^{1111212101111} is an apocalyptic number.

1111212101111 is a deficient number, since it is larger than the sum of its proper divisors (217112748169).

1111212101111 is a wasteful number, since it uses less digits than its factorization.

1111212101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64235.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 1111212101111 its reverse (1111012121111), we get a palindrome (2222224222222).

The spelling of 1111212101111 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred one thousand, one hundred eleven".