1121220100111 has 4 divisors (see below), whose sum is σ = 1125483294672. Its totient is φ = 1116956905552.

The previous prime is 1121220100087. The next prime is 1121220100127. The reversal of 1121220100111 is 1110010221211.

It is a happy number.

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 1121220100111 - 2⁵ = 1121220100079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121220100091 and 1121220100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220100141) 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, 2131596886 + ... + 2131597411.

It is an arithmetic number, because the mean of its divisors is an integer number (281370823668).

Almost surely, 2^{1121220100111} is an apocalyptic number.

1121220100111 is a deficient number, since it is larger than the sum of its proper divisors (4263194561).

1121220100111 is an equidigital number, since it uses as much as digits as its factorization.

1121220100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263194560.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1121220100111 its reverse (1110010221211), we get a palindrome (2231230321322).

The spelling of 1121220100111 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred thousand, one hundred eleven".