1111122111121 has 32 divisors (see below), whose sum is σ = 1240026350976. Its totient is φ = 987148800000.

The previous prime is 1111122111119. The next prime is 1111122111131. The reversal of 1111122111121 is 1211112211111.

It is not a de Polignac number, because 1111122111121 - 2¹ = 1111122111119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111122111095 and 1111122111104.

It is not an unprimeable number, because it can be changed into a prime (1111122111131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112218271 + ... + 112228171.

It is an arithmetic number, because the mean of its divisors is an integer number (38750823468).

Almost surely, 2^{1111122111121} is an apocalyptic number.

1111122111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111122111121 is a deficient number, since it is larger than the sum of its proper divisors (128904239855).

1111122111121 is a wasteful number, since it uses less digits than its factorization.

1111122111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11313.

The product of its digits is 8, while the sum is 16.

Adding to 1111122111121 its reverse (1211112211111), we get a palindrome (2322234322232).

The spelling of 1111122111121 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, one hundred eleven thousand, one hundred twenty-one".