11011201021 has 2 divisors, whose sum is σ = 11011201022. Its totient is φ = 11011201020.

The previous prime is 11011201013. The next prime is 11011201027. The reversal of 11011201021 is 12010211011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9696340900 + 1314860121 = 98470^2 + 36261^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011201021 - 2³ = 11011201013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011200989 and 11011201007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011201027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505600510 + 5505600511.

It is an arithmetic number, because the mean of its divisors is an integer number (5505600511).

Almost surely, 2^11011201021 is an apocalyptic number.

It is an amenable number.

11011201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011201021 is an equidigital number, since it uses as much as digits as its factorization.

11011201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11011201021 its reverse (12010211011), we get a palindrome (23021412032).

The spelling of 11011201021 in words is "eleven billion, eleven million, two hundred one thousand, twenty-one".