1101211212111 has 16 divisors (see below), whose sum is σ = 1470578927616. Its totient is φ = 732992845536.

The previous prime is 1101211212109. The next prime is 1101211212133. The reversal of 1101211212111 is 1112121121011.

It is not a de Polignac number, because 1101211212111 - 2¹ = 1101211212109 is a prime.

It is a super-2 number, since 2×1101211212111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101211212011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6395301 + ... + 6565233.

It is an arithmetic number, because the mean of its divisors is an integer number (91911182976).

Almost surely, 2^{1101211212111} is an apocalyptic number.

1101211212111 is a deficient number, since it is larger than the sum of its proper divisors (369367715505).

1101211212111 is a wasteful number, since it uses less digits than its factorization.

1101211212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173302.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1101211212111 its reverse (1112121121011), we get a palindrome (2213332333122).

The spelling of 1101211212111 in words is "one trillion, one hundred one billion, two hundred eleven million, two hundred twelve thousand, one hundred eleven".