1121111011 has 24 divisors (see below), whose sum is σ = 1214756352. Its totient is φ = 1032609600.

The previous prime is 1121110997. The next prime is 1121111023. The reversal of 1121111011 is 1101111211.

It is not a de Polignac number, because 1121111011 - 2²¹ = 1119013859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121111051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4136806 + ... + 4137076.

It is an arithmetic number, because the mean of its divisors is an integer number (50614848).

Almost surely, 2^1121111011 is an apocalyptic number.

1121111011 is a deficient number, since it is larger than the sum of its proper divisors (93645341).

1121111011 is a wasteful number, since it uses less digits than its factorization.

1121111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

The square root of 1121111011 is about 33482.9958486394. The cubic root of 1121111011 is about 1038.8420948688.

Adding to 1121111011 its reverse (1101111211), we get a palindrome (2222222222).

It can be divided in two parts, 11211 and 11011, that multiplied together give a palindrome (123444321).

The spelling of 1121111011 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, eleven".