11221021020001 has 4 divisors (see below), whose sum is σ = 12084176483092. Its totient is φ = 10357865556912.

The previous prime is 11221021019927. The next prime is 11221021020007. The reversal of 11221021020001 is 10002012012211.

11221021020001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2510117392225 + 8710903627776 = 1584335^2 + 2951424^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221021020001 - 2²⁷ = 11220886802273 is a prime.

It is a super-2 number, since 2×11221021020001² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 863155463077 = 11221021020001 / (1 + 1 + 2 + 2 + 1 + 0 + 2 + 1 + 0 + 2 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221021020007) 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, 431577731526 + ... + 431577731551.

It is an arithmetic number, because the mean of its divisors is an integer number (3021044120773).

Almost surely, 2^{11221021020001} is an apocalyptic number.

It is an amenable number.

11221021020001 is a deficient number, since it is larger than the sum of its proper divisors (863155463091).

11221021020001 is an equidigital number, since it uses as much as digits as its factorization.

11221021020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863155463090.

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

Adding to 11221021020001 its reverse (10002012012211), we get a palindrome (21223033032212).

The spelling of 11221021020001 in words is "eleven trillion, two hundred twenty-one billion, twenty-one million, twenty thousand, one".