1111121121 has 32 divisors (see below), whose sum is σ = 1706158080. Its totient is φ = 636120000.

The previous prime is 1111121119. The next prime is 1111121149. The reversal of 1111121121 is 1211211111.

It is not a de Polignac number, because 1111121121 - 2¹ = 1111121119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111121097 and 1111121106.

It is not an unprimeable number, because it can be changed into a prime (1111121021) 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, 231496 + ... + 236246.

It is an arithmetic number, because the mean of its divisors is an integer number (53317440).

Almost surely, 2^1111121121 is an apocalyptic number.

1111121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111121121 is a deficient number, since it is larger than the sum of its proper divisors (595036959).

1111121121 is a wasteful number, since it uses less digits than its factorization.

1111121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157.

The product of its digits is 4, while the sum is 12.

The square root of 1111121121 is about 33333.4834813285. The cubic root of 1111121121 is about 1035.7472789472.

Adding to 1111121121 its reverse (1211211111), we get a palindrome (2322332232).

It can be divided in two parts, 1111 and 121121, that multiplied together give a palindrome (134565431).

The spelling of 1111121121 in words is "one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred twenty-one".