11010121011221 has 8 divisors (see below), whose sum is σ = 11123230850904. Its totient is φ = 10897091539200.

The previous prime is 11010121011101. The next prime is 11010121011223. The reversal of 11010121011221 is 12211012101011.

It can be written as a sum of positive squares in 4 ways, for example, as 7244231463121 + 3765889548100 = 2691511^2 + 1940590^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11010121011221 - 2¹⁰ = 11010121010197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11010121011196 and 11010121011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11010121011223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19816496 + ... + 20364521.

It is an arithmetic number, because the mean of its divisors is an integer number (1390403856363).

Almost surely, 2^{11010121011221} is an apocalyptic number.

It is an amenable number.

11010121011221 is a deficient number, since it is larger than the sum of its proper divisors (113109839683).

11010121011221 is a wasteful number, since it uses less digits than its factorization.

11010121011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40183831.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11010121011221 its reverse (12211012101011), we get a palindrome (23221133112232).

The spelling of 11010121011221 in words is "eleven trillion, ten billion, one hundred twenty-one million, eleven thousand, two hundred twenty-one".