11055015611621 has 2 divisors, whose sum is σ = 11055015611622. Its totient is φ = 11055015611620.

The previous prime is 11055015611569. The next prime is 11055015611657. The reversal of 11055015611621 is 12611651055011.

11055015611621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5806586618596 + 5248428993025 = 2409686^2 + 2290945^2 .

It is a cyclic number.

It is not a de Polignac number, because 11055015611621 - 2²⁶ = 11054948502757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11055015611221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5527507805810 + 5527507805811.

It is an arithmetic number, because the mean of its divisors is an integer number (5527507805811).

Almost surely, 2^{11055015611621} is an apocalyptic number.

It is an amenable number.

11055015611621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11055015611621 is an equidigital number, since it uses as much as digits as its factorization.

11055015611621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 35.

Adding to 11055015611621 its reverse (12611651055011), we get a palindrome (23666666666632).

The spelling of 11055015611621 in words is "eleven trillion, fifty-five billion, fifteen million, six hundred eleven thousand, six hundred twenty-one".