1021020011 has 4 divisors (see below), whose sum is σ = 1113840024. Its totient is φ = 928200000.

The previous prime is 1021019977. The next prime is 1021020019. The reversal of 1021020011 is 1100201201.

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 1021020011 - 2¹⁸ = 1020757867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021020019) 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, 46409990 + ... + 46410011.

It is an arithmetic number, because the mean of its divisors is an integer number (278460006).

Almost surely, 2^1021020011 is an apocalyptic number.

1021020011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1021020011 is a deficient number, since it is larger than the sum of its proper divisors (92820013).

1021020011 is an equidigital number, since it uses as much as digits as its factorization.

1021020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92820012.

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

The square root of 1021020011 is about 31953.4037467059. The cubic root of 1021020011 is about 1006.9581422946.

Adding to 1021020011 its reverse (1100201201), we get a palindrome (2121221212).

The spelling of 1021020011 in words is "one billion, twenty-one million, twenty thousand, eleven".