1111121011 has 24 divisors (see below), whose sum is σ = 1518504624. Its totient is φ = 799202880.

The previous prime is 1111120957. The next prime is 1111121021. The reversal of 1111121011 is 1101211111.

It is not a de Polignac number, because 1111121011 - 2⁷ = 1111120883 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 72280 + ... + 86293.

It is an arithmetic number, because the mean of its divisors is an integer number (63271026).

Almost surely, 2^1111121011 is an apocalyptic number.

1111121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111121011 is a deficient number, since it is larger than the sum of its proper divisors (407383613).

1111121011 is a wasteful number, since it uses less digits than its factorization.

1111121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158611 (or 158604 counting only the distinct ones).

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

The square root of 1111121011 is about 33333.4818313359. The cubic root of 1111121011 is about 1035.7472447678.

Adding to 1111121011 its reverse (1101211111), we get a palindrome (2212332122).

The spelling of 1111121011 in words is "one billion, one hundred eleven million, one hundred twenty-one thousand, eleven".