11021001001021 has 12 divisors (see below), whose sum is σ = 12114154958976. Its totient is φ = 10018957732520.

The previous prime is 11021001001019. The next prime is 11021001001039. The reversal of 11021001001021 is 12010010012011.

It is not a de Polignac number, because 11021001001021 - 2¹ = 11021001001019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021001000989 and 11021001001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021001001051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9106506 + ... + 10245508.

It is an arithmetic number, because the mean of its divisors is an integer number (1009512913248).

Almost surely, 2^{11021001001021} is an apocalyptic number.

11021001001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11021001001021 is a deficient number, since it is larger than the sum of its proper divisors (1093153957955).

11021001001021 is a wasteful number, since it uses less digits than its factorization.

11021001001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218992 (or 1218981 counting only the distinct ones).

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

Adding to 11021001001021 its reverse (12010010012011), we get a palindrome (23031011013032).

The spelling of 11021001001021 in words is "eleven trillion, twenty-one billion, one million, one thousand, twenty-one".