1100221022221 has 2 divisors, whose sum is σ = 1100221022222. Its totient is φ = 1100221022220.

The previous prime is 1100221022179. The next prime is 1100221022233. The reversal of 1100221022221 is 1222201220011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887007959721 + 213213062500 = 941811^2 + 461750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100221022221 - 2¹³ = 1100221014029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100221022195 and 1100221022204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100221022281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550110511110 + 550110511111.

It is an arithmetic number, because the mean of its divisors is an integer number (550110511111).

Almost surely, 2^{1100221022221} is an apocalyptic number.

It is an amenable number.

1100221022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100221022221 is an equidigital number, since it uses as much as digits as its factorization.

1100221022221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1100221022221 its reverse (1222201220011), we get a palindrome (2322422242232).

The spelling of 1100221022221 in words is "one trillion, one hundred billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty-one".