11122208021 has 2 divisors, whose sum is σ = 11122208022. Its totient is φ = 11122208020.

The previous prime is 11122208017. The next prime is 11122208023. The reversal of 11122208021 is 12080222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10639922500 + 482285521 = 103150^2 + 21961^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122208021 - 2² = 11122208017 is a prime.

It is a super-2 number, since 2×11122208021² (a number of 21 digits) contains 22 as substring.

Together with 11122208023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11122207984 and 11122208002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122208023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561104010 + 5561104011.

It is an arithmetic number, because the mean of its divisors is an integer number (5561104011).

Almost surely, 2^11122208021 is an apocalyptic number.

It is an amenable number.

11122208021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122208021 is an equidigital number, since it uses as much as digits as its factorization.

11122208021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 11122208021 in words is "eleven billion, one hundred twenty-two million, two hundred eight thousand, twenty-one".