1021011020011 has 4 divisors (see below), whose sum is σ = 1021117042624. Its totient is φ = 1020904997400.

The previous prime is 1021011019993. The next prime is 1021011020119. The reversal of 1021011020011 is 1100201101201.

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 1021011020011 - 2¹⁹ = 1021010495723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021011020011.

It is not an unprimeable number, because it can be changed into a prime (1021011060011) 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, 52996860 + ... + 53016121.

It is an arithmetic number, because the mean of its divisors is an integer number (255279260656).

Almost surely, 2^{1021011020011} is an apocalyptic number.

1021011020011 is a deficient number, since it is larger than the sum of its proper divisors (106022613).

1021011020011 is an equidigital number, since it uses as much as digits as its factorization.

1021011020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106022612.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1021011020011 its reverse (1100201101201), we get a palindrome (2121212121212).

The spelling of 1021011020011 in words is "one trillion, twenty-one billion, eleven million, twenty thousand, eleven".