1121211211211 has 32 divisors (see below), whose sum is σ = 1428142396800. Its totient is φ = 856158750720.

The previous prime is 1121211211177. The next prime is 1121211211217. The reversal of 1121211211211 is 1121121121211.

It is not a de Polignac number, because 1121211211211 - 2¹⁴ = 1121211194827 is a prime.

It is a super-2 number, since 2×1121211211211² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121211211211.

It is not an unprimeable number, because it can be changed into a prime (1121211211217) 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, 6215651 + ... + 6393491.

It is an arithmetic number, because the mean of its divisors is an integer number (44629449900).

Almost surely, 2^{1121211211211} is an apocalyptic number.

1121211211211 is a deficient number, since it is larger than the sum of its proper divisors (306931185589).

1121211211211 is a wasteful number, since it uses less digits than its factorization.

1121211211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180279.

The product of its digits is 16, while the sum is 17.

Adding to 1121211211211 its reverse (1121121121211), we get a palindrome (2242332332422).

The spelling of 1121211211211 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, two hundred eleven".