11102101212221 has 4 divisors (see below), whose sum is σ = 11102108093244. Its totient is φ = 11102094331200.

The previous prime is 11102101212211. The next prime is 11102101212269. The reversal of 11102101212221 is 12221210120111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3536223835225 + 7565877376996 = 1880485^2 + 2750614^2 .

It is a cyclic number.

It is not a de Polignac number, because 11102101212221 - 2²² = 11102097017917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11102101212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11102101212211) 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, 434261 + ... + 4732101.

It is an arithmetic number, because the mean of its divisors is an integer number (2775527023311).

Almost surely, 2^{11102101212221} is an apocalyptic number.

It is an amenable number.

11102101212221 is a deficient number, since it is larger than the sum of its proper divisors (6881023).

11102101212221 is an equidigital number, since it uses as much as digits as its factorization.

11102101212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6881022.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11102101212221 its reverse (12221210120111), we get a palindrome (23323311332332).

The spelling of 11102101212221 in words is "eleven trillion, one hundred two billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".