11021221001021 has 32 divisors (see below), whose sum is σ = 14085892804608. Its totient is φ = 8374234040640.

The previous prime is 11021221000987. The next prime is 11021221001039. The reversal of 11021221001021 is 12010012212011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021221001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021221000987 and 11021221001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021221001081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7618901 + ... + 8949306.

It is an arithmetic number, because the mean of its divisors is an integer number (440184150144).

Almost surely, 2^{11021221001021} is an apocalyptic number.

11021221001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11021221001021 is a deficient number, since it is larger than the sum of its proper divisors (3064671803587).

11021221001021 is a wasteful number, since it uses less digits than its factorization.

11021221001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16568441.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11021221001021 its reverse (12010012212011), we get a palindrome (23031233213032).

The spelling of 11021221001021 in words is "eleven trillion, twenty-one billion, two hundred twenty-one million, one thousand, twenty-one".