11002211021 has 2 divisors, whose sum is σ = 11002211022. Its totient is φ = 11002211020.

The previous prime is 11002210993. The next prime is 11002211029. The reversal of 11002211021 is 12011220011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10561672900 + 440538121 = 102770^2 + 20989^2 .

It is a cyclic number.

It is not a de Polignac number, because 11002211021 - 2¹⁸ = 11001948877 is a prime.

It is a super-2 number, since 2×11002211021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11002210993 and 11002211011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11002211029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5501105510 + 5501105511.

It is an arithmetic number, because the mean of its divisors is an integer number (5501105511).

Almost surely, 2^11002211021 is an apocalyptic number.

It is an amenable number.

11002211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11002211021 is an equidigital number, since it uses as much as digits as its factorization.

11002211021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11002211021 its reverse (12011220011), we get a palindrome (23013431032).

The spelling of 11002211021 in words is "eleven billion, two million, two hundred eleven thousand, twenty-one".