1101202220221 has 2 divisors, whose sum is σ = 1101202220222. Its totient is φ = 1101202220220.

The previous prime is 1101202220171. The next prime is 1101202220263. The reversal of 1101202220221 is 1220222021011.

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., 823757727321 + 277444492900 = 907611^2 + 526730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101202220221 - 2¹³ = 1101202212029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1101202220195 and 1101202220204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101202221221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550601110110 + 550601110111.

It is an arithmetic number, because the mean of its divisors is an integer number (550601110111).

Almost surely, 2^{1101202220221} is an apocalyptic number.

It is an amenable number.

1101202220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101202220221 is an equidigital number, since it uses as much as digits as its factorization.

1101202220221 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 1101202220221 its reverse (1220222021011), we get a palindrome (2321424241232).

The spelling of 1101202220221 in words is "one trillion, one hundred one billion, two hundred two million, two hundred twenty thousand, two hundred twenty-one".