1121220011111 has 4 divisors (see below), whose sum is σ = 1121226438552. Its totient is φ = 1121213583672.

The previous prime is 1121220011057. The next prime is 1121220011141. The reversal of 1121220011111 is 1111100221211.

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 1121220011111 - 2⁶ = 1121220011047 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 (1121220011141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2944541 + ... + 3303446.

It is an arithmetic number, because the mean of its divisors is an integer number (280306609638).

Almost surely, 2^{1121220011111} is an apocalyptic number.

1121220011111 is a deficient number, since it is larger than the sum of its proper divisors (6427441).

1121220011111 is an equidigital number, since it uses as much as digits as its factorization.

1121220011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427440.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1121220011111 its reverse (1111100221211), we get a palindrome (2232320232322).

The spelling of 1121220011111 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, eleven thousand, one hundred eleven".