11010101012221 has 4 divisors (see below), whose sum is σ = 11010187058112. Its totient is φ = 11010014966332.

The previous prime is 11010101012219. The next prime is 11010101012233. The reversal of 11010101012221 is 12221010101011.

It is a happy number.

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 11010101012221 - 2¹ = 11010101012219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11010101012921) 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, 42830725 + ... + 43087018.

It is an arithmetic number, because the mean of its divisors is an integer number (2752546764528).

Almost surely, 2^{11010101012221} is an apocalyptic number.

It is an amenable number.

11010101012221 is a deficient number, since it is larger than the sum of its proper divisors (86045891).

11010101012221 is an equidigital number, since it uses as much as digits as its factorization.

11010101012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86045890.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11010101012221 its reverse (12221010101011), we get a palindrome (23231111113232).

The spelling of 11010101012221 in words is "eleven trillion, ten billion, one hundred one million, twelve thousand, two hundred twenty-one".