11220012001021 has 4 divisors (see below), whose sum is σ = 11227020130044. Its totient is φ = 11213003872000.

The previous prime is 11220012000983. The next prime is 11220012001039. The reversal of 11220012001021 is 12010021002211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7226365476100 + 3993646524921 = 2688190^2 + 1998411^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220012001021 - 2²⁹ = 11219475130109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220012000992 and 11220012001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220016001021) 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, 3504062110 + ... + 3504065311.

It is an arithmetic number, because the mean of its divisors is an integer number (2806755032511).

Almost surely, 2^{11220012001021} is an apocalyptic number.

It is an amenable number.

11220012001021 is a deficient number, since it is larger than the sum of its proper divisors (7008129023).

11220012001021 is an equidigital number, since it uses as much as digits as its factorization.

11220012001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008129022.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11220012001021 its reverse (12010021002211), we get a palindrome (23230033003232).

The spelling of 11220012001021 in words is "eleven trillion, two hundred twenty billion, twelve million, one thousand, twenty-one".