1123212133111 has 4 divisors (see below), whose sum is σ = 1123418573424. Its totient is φ = 1123005692800.

The previous prime is 1123212133093. The next prime is 1123212133139. The reversal of 1123212133111 is 1113312123211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123212133111 - 2¹³ = 1123212124919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123212133181) 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 3 ways as a sum of consecutive naturals, for example, 103211995 + ... + 103222876.

It is an arithmetic number, because the mean of its divisors is an integer number (280854643356).

Almost surely, 2^{1123212133111} is an apocalyptic number.

1123212133111 is a deficient number, since it is larger than the sum of its proper divisors (206440313).

1123212133111 is an equidigital number, since it uses as much as digits as its factorization.

1123212133111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206440312.

The product of its digits is 216, while the sum is 22.

Adding to 1123212133111 its reverse (1113312123211), we get a palindrome (2236524256322).

The spelling of 1123212133111 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, one hundred thirty-three thousand, one hundred eleven".