1121231123211 has 16 divisors (see below), whose sum is σ = 1496211951104. Its totient is φ = 746869050144.

The previous prime is 1121231123209. The next prime is 1121231123231. The reversal of 1121231123211 is 1123211321211.

It is not a de Polignac number, because 1121231123211 - 2¹ = 1121231123209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121231123231) 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 15 ways as a sum of consecutive naturals, for example, 27034056 + ... + 27075498.

It is an arithmetic number, because the mean of its divisors is an integer number (93513246944).

Almost surely, 2^{1121231123211} is an apocalyptic number.

1121231123211 is a deficient number, since it is larger than the sum of its proper divisors (374980827893).

1121231123211 is a wasteful number, since it uses less digits than its factorization.

1121231123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48690.

The product of its digits is 144, while the sum is 21.

Adding to 1121231123211 its reverse (1123211321211), we get a palindrome (2244442444422).

The spelling of 1121231123211 in words is "one trillion, one hundred twenty-one billion, two hundred thirty-one million, one hundred twenty-three thousand, two hundred eleven".