11211011101021 has 4 divisors (see below), whose sum is σ = 11211087519100. Its totient is φ = 11210934682944.

The previous prime is 11211011101001. The next prime is 11211011101061. The reversal of 11211011101021 is 12010111011211.

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 6885318272121 + 4325692828900 = 2623989^2 + 2079830^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211011101021 - 2⁴³ = 2414918078813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211011100992 and 11211011101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211011101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37988556 + ... + 38282533.

It is an arithmetic number, because the mean of its divisors is an integer number (2802771879775).

Almost surely, 2^{11211011101021} is an apocalyptic number.

It is an amenable number.

11211011101021 is a deficient number, since it is larger than the sum of its proper divisors (76418079).

11211011101021 is an equidigital number, since it uses as much as digits as its factorization.

11211011101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76418078.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11211011101021 its reverse (12010111011211), we get a palindrome (23221122112232).

The spelling of 11211011101021 in words is "eleven trillion, two hundred eleven billion, eleven million, one hundred one thousand, twenty-one".