1011110121 has 24 divisors (see below), whose sum is σ = 1730956864. Its totient is φ = 577776240.

The previous prime is 1011110069. The next prime is 1011110129. The reversal of 1011110121 is 1210111101.

It is not a de Polignac number, because 1011110121 - 2⁶ = 1011110057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1011110129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295510 + ... + 298911.

Almost surely, 2^1011110121 is an apocalyptic number.

It is an amenable number.

1011110121 is a deficient number, since it is larger than the sum of its proper divisors (719846743).

1011110121 is an frugal number, since it uses more digits than its factorization.

1011110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594443 (or 594431 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 1011110121 is about 31797.9578117841. The cubic root of 1011110121 is about 1003.6897427210.

Adding to 1011110121 its reverse (1210111101), we get a palindrome (2221221222).

The spelling of 1011110121 in words is "one billion, eleven million, one hundred ten thousand, one hundred twenty-one".