1020120011 has 4 divisors (see below), whose sum is σ = 1020226392. Its totient is φ = 1020013632.

The previous prime is 1020119999. The next prime is 1020120041. The reversal of 1020120011 is 1100210201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020120011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020120041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37205 + ... + 58518.

It is an arithmetic number, because the mean of its divisors is an integer number (255056598).

Almost surely, 2^1020120011 is an apocalyptic number.

1020120011 is a deficient number, since it is larger than the sum of its proper divisors (106381).

1020120011 is an equidigital number, since it uses as much as digits as its factorization.

1020120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106380.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1020120011 is about 31939.3176351656. The cubic root of 1020120011 is about 1006.6621870308.

Adding to 1020120011 its reverse (1100210201), we get a palindrome (2120330212).

The spelling of 1020120011 in words is "one billion, twenty million, one hundred twenty thousand, eleven".