1101211222111 has 48 divisors (see below), whose sum is σ = 1506490574400. Its totient is φ = 783179527680.

The previous prime is 1101211222099. The next prime is 1101211222129. The reversal of 1101211222111 is 1112221121011.

It is not a de Polignac number, because 1101211222111 - 2²¹ = 1101209124959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101211222411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 418125 + ... + 1541833.

It is an arithmetic number, because the mean of its divisors is an integer number (31385220300).

Almost surely, 2^{1101211222111} is an apocalyptic number.

1101211222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1101211222111 is a deficient number, since it is larger than the sum of its proper divisors (405279352289).

1101211222111 is a wasteful number, since it uses less digits than its factorization.

1101211222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123840 (or 1123829 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1101211222111 its reverse (1112221121011), we get a palindrome (2213432343122).

It can be divided in two parts, 110121 and 1222111, that multiplied together give a palindrome (134580085431).

The spelling of 1101211222111 in words is "one trillion, one hundred one billion, two hundred eleven million, two hundred twenty-two thousand, one hundred eleven".