1020420011 has 16 divisors (see below), whose sum is σ = 1126325760. Its totient is φ = 918721440.

The previous prime is 1020419993. The next prime is 1020420031. The reversal of 1020420011 is 1100240201.

It is not a de Polignac number, because 1020420011 - 2¹⁴ = 1020403627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020419974 and 1020420001.

It is not an unprimeable number, because it can be changed into a prime (1020420031) 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 15 ways as a sum of consecutive naturals, for example, 79256 + ... + 91226.

It is an arithmetic number, because the mean of its divisors is an integer number (70395360).

Almost surely, 2^1020420011 is an apocalyptic number.

1020420011 is a deficient number, since it is larger than the sum of its proper divisors (105905749).

1020420011 is a wasteful number, since it uses less digits than its factorization.

1020420011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12146.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1020420011 is about 31944.0136958398. The cubic root of 1020420011 is about 1006.7608581197.

Adding to 1020420011 its reverse (1100240201), we get a palindrome (2120660212).

The spelling of 1020420011 in words is "one billion, twenty million, four hundred twenty thousand, eleven".