1211101232111 has 8 divisors (see below), whose sum is σ = 1258448283648. Its totient is φ = 1164271635000.

The previous prime is 1211101232059. The next prime is 1211101232129. The reversal of 1211101232111 is 1112321011121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211101232111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211101232111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211101232141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129358835 + ... + 129368196.

It is an arithmetic number, because the mean of its divisors is an integer number (157306035456).

Almost surely, 2^{1211101232111} is an apocalyptic number.

1211101232111 is a deficient number, since it is larger than the sum of its proper divisors (47347051537).

1211101232111 is a wasteful number, since it uses less digits than its factorization.

1211101232111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258727213.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1211101232111 its reverse (1112321011121), we get a palindrome (2323422243232).

The spelling of 1211101232111 in words is "one trillion, two hundred eleven billion, one hundred one million, two hundred thirty-two thousand, one hundred eleven".