11098888665421 has 2 divisors, whose sum is σ = 11098888665422. Its totient is φ = 11098888665420.

The previous prime is 11098888665379. The next prime is 11098888665443. The reversal of 11098888665421 is 12456688889011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8639402189796 + 2459486475625 = 2939286^2 + 1568275^2 .

It is a cyclic number.

It is not a de Polignac number, because 11098888665421 - 2⁹ = 11098888664909 is a prime.

It is a super-2 number, since 2×11098888665421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11098888365421) 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 as a sum of consecutive naturals, namely, 5549444332710 + 5549444332711.

It is an arithmetic number, because the mean of its divisors is an integer number (5549444332711).

Almost surely, 2^{11098888665421} is an apocalyptic number.

It is an amenable number.

11098888665421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11098888665421 is an equidigital number, since it uses as much as digits as its factorization.

11098888665421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53084160, while the sum is 67.

The spelling of 11098888665421 in words is "eleven trillion, ninety-eight billion, eight hundred eighty-eight million, six hundred sixty-five thousand, four hundred twenty-one".