11101219021 has 2 divisors, whose sum is σ = 11101219022. Its totient is φ = 11101219020.

The previous prime is 11101219007. The next prime is 11101219037. The reversal of 11101219021 is 12091210111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10414202500 + 687016521 = 102050^2 + 26211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101219021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11101219021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101219001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550609510 + 5550609511.

It is an arithmetic number, because the mean of its divisors is an integer number (5550609511).

Almost surely, 2^11101219021 is an apocalyptic number.

It is an amenable number.

11101219021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101219021 is an equidigital number, since it uses as much as digits as its factorization.

11101219021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 11101219021 its reverse (12091210111), we get a palindrome (23192429132).

The spelling of 11101219021 in words is "eleven billion, one hundred one million, two hundred nineteen thousand, twenty-one".