11101011220421 has 2 divisors, whose sum is σ = 11101011220422. Its totient is φ = 11101011220420.

The previous prime is 11101011220393. The next prime is 11101011220451. The reversal of 11101011220421 is 12402211010111.

11101011220421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11084997583396 + 16013637025 = 3329414^2 + 126545^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101011220421 - 2²⁶ = 11100944111557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11101011220421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101011220451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550505610210 + 5550505610211.

It is an arithmetic number, because the mean of its divisors is an integer number (5550505610211).

Almost surely, 2^{11101011220421} is an apocalyptic number.

It is an amenable number.

11101011220421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101011220421 is an equidigital number, since it uses as much as digits as its factorization.

11101011220421 is an evil number, because the sum of its binary digits is even.

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

Adding to 11101011220421 its reverse (12402211010111), we get a palindrome (23503222230532).

The spelling of 11101011220421 in words is "eleven trillion, one hundred one billion, eleven million, two hundred twenty thousand, four hundred twenty-one".