11221220002123 has 4 divisors (see below), whose sum is σ = 11221236370840. Its totient is φ = 11221203633408.

The previous prime is 11221220002099. The next prime is 11221220002141. The reversal of 11221220002123 is 32120002212211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11221220002123 - 2²¹ = 11221217904971 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 11221220002123.

It is not an unprimeable number, because it can be changed into a prime (11221220002163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7108965 + ... + 8542822.

It is an arithmetic number, because the mean of its divisors is an integer number (2805309092710).

Almost surely, 2^{11221220002123} is an apocalyptic number.

11221220002123 is a deficient number, since it is larger than the sum of its proper divisors (16368717).

11221220002123 is an equidigital number, since it uses as much as digits as its factorization.

11221220002123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16368716.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11221220002123 its reverse (32120002212211), we get a palindrome (43341222214334).

The spelling of 11221220002123 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, two thousand, one hundred twenty-three".