1121223210111 has 36 divisors (see below), whose sum is σ = 1664848136952. Its totient is φ = 727127440704.

The previous prime is 1121223210049. The next prime is 1121223210127. The reversal of 1121223210111 is 1110123221211.

It is a happy number.

1121223210111 is a `hidden beast` number, since 1 + 121 + 223 + 210 + 111 = 666.

It is not a de Polignac number, because 1121223210111 - 2⁷ = 1121223209983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121223218111) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 116268456 + ... + 116278098.

It is an arithmetic number, because the mean of its divisors is an integer number (46245781582).

Almost surely, 2^{1121223210111} is an apocalyptic number.

1121223210111 is a deficient number, since it is larger than the sum of its proper divisors (543624926841).

1121223210111 is an equidigital number, since it uses as much as digits as its factorization.

1121223210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19160 (or 19120 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1121223210111 its reverse (1110123221211), we get a palindrome (2231346431322).

It can be divided in two parts, 112122 and 3210111, that added together give a palindrome (3322233).

The spelling of 1121223210111 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-three million, two hundred ten thousand, one hundred eleven".