11211221002101 has 4 divisors (see below), whose sum is σ = 14948294669472. Its totient is φ = 7474147334732.

The previous prime is 11211221002097. The next prime is 11211221002123. The reversal of 11211221002101 is 10120012211211.

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 11211221002101 - 2² = 11211221002097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211221000101) 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, 1868536833681 + ... + 1868536833686.

It is an arithmetic number, because the mean of its divisors is an integer number (3737073667368).

Almost surely, 2^{11211221002101} is an apocalyptic number.

It is an amenable number.

11211221002101 is a deficient number, since it is larger than the sum of its proper divisors (3737073667371).

11211221002101 is an equidigital number, since it uses as much as digits as its factorization.

11211221002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737073667370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11211221002101 its reverse (10120012211211), we get a palindrome (21331233213312).

The spelling of 11211221002101 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, two thousand, one hundred one".