11012011211221 has 4 divisors (see below), whose sum is σ = 11091234313600. Its totient is φ = 10932788108844.

The previous prime is 11012011211153. The next prime is 11012011211233. The reversal of 11012011211221 is 12211211021011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11012011211221 - 2¹³ = 11012011203029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11012011211195 and 11012011211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012011211251) 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, 39611550981 + ... + 39611551258.

It is an arithmetic number, because the mean of its divisors is an integer number (2772808578400).

Almost surely, 2^{11012011211221} is an apocalyptic number.

It is an amenable number.

11012011211221 is a deficient number, since it is larger than the sum of its proper divisors (79223102379).

11012011211221 is an equidigital number, since it uses as much as digits as its factorization.

11012011211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79223102378.

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

Adding to 11012011211221 its reverse (12211211021011), we get a palindrome (23223222232232).

The spelling of 11012011211221 in words is "eleven trillion, twelve billion, eleven million, two hundred eleven thousand, two hundred twenty-one".