1020020011 has 4 divisors (see below), whose sum is σ = 1031481000. Its totient is φ = 1008559024.

The previous prime is 1020019969. The next prime is 1020020041. The reversal of 1020020011 is 1100200201.

1020020011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1020020011 - 2²¹ = 1017922859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020019976 and 1020020003.

It is not an unprimeable number, because it can be changed into a prime (1020020041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5730361 + ... + 5730538.

It is an arithmetic number, because the mean of its divisors is an integer number (257870250).

Almost surely, 2^1020020011 is an apocalyptic number.

1020020011 is a deficient number, since it is larger than the sum of its proper divisors (11460989).

1020020011 is an equidigital number, since it uses as much as digits as its factorization.

1020020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460988.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1020020011 is about 31937.7521281633. The cubic root of 1020020011 is about 1006.6292923690.

Adding to 1020020011 its reverse (1100200201), we get a palindrome (2120220212).

The spelling of 1020020011 in words is "one billion, twenty million, twenty thousand, eleven".