1120021011 has 12 divisors (see below), whose sum is σ = 1618133088. Its totient is φ = 746530704.

The previous prime is 1120021009. The next prime is 1120021099. The reversal of 1120021011 is 1101200211.

It is a happy number.

It is not a de Polignac number, because 1120021011 - 2¹ = 1120021009 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1120020984 and 1120021002.

It is not an unprimeable number, because it can be changed into a prime (1120021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52701 + ... + 70833.

It is an arithmetic number, because the mean of its divisors is an integer number (134844424).

Almost surely, 2^1120021011 is an apocalyptic number.

1120021011 is a deficient number, since it is larger than the sum of its proper divisors (498112077).

1120021011 is a wasteful number, since it uses less digits than its factorization.

1120021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25002 (or 24999 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1120021011 is about 33466.7149717447. The cubic root of 1120021011 is about 1038.5053143471.

Adding to 1120021011 its reverse (1101200211), we get a palindrome (2221221222).

The spelling of 1120021011 in words is "one billion, one hundred twenty million, twenty-one thousand, eleven".