11100121221213 has 24 divisors (see below), whose sum is σ = 16468314349656. Its totient is φ = 7199436816000.

The previous prime is 11100121221191. The next prime is 11100121221223. The reversal of 11100121221213 is 31212212100111.

It is a happy number.

11100121221213 is a `hidden beast` number, since 1 + 110 + 0 + 121 + 221 + 213 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7693150964409 + 3406970256804 = 2773653^2 + 1845798^2 .

It is not a de Polignac number, because 11100121221213 - 2⁶ = 11100121221149 is a prime.

It is a super-2 number, since 2×11100121221213² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100121221223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2269863 + ... + 5229963.

It is an arithmetic number, because the mean of its divisors is an integer number (686179764569).

Almost surely, 2^{11100121221213} is an apocalyptic number.

It is an amenable number.

11100121221213 is a deficient number, since it is larger than the sum of its proper divisors (5368193128443).

11100121221213 is a wasteful number, since it uses less digits than its factorization.

11100121221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971405 (or 2971402 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 11100121221213 its reverse (31212212100111), we get a palindrome (42312333321324).

The spelling of 11100121221213 in words is "eleven trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred thirteen".