1131112202221 has 2 divisors, whose sum is σ = 1131112202222. Its totient is φ = 1131112202220.

The previous prime is 1131112202197. The next prime is 1131112202261. The reversal of 1131112202221 is 1222022111311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665154424900 + 465957777321 = 815570^2 + 682611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131112202221 - 2¹³ = 1131112194029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131112202261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565556101110 + 565556101111.

It is an arithmetic number, because the mean of its divisors is an integer number (565556101111).

Almost surely, 2^{1131112202221} is an apocalyptic number.

It is an amenable number.

1131112202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131112202221 is an equidigital number, since it uses as much as digits as its factorization.

1131112202221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1131112202221 its reverse (1222022111311), we get a palindrome (2353134313532).

The spelling of 1131112202221 in words is "one trillion, one hundred thirty-one billion, one hundred twelve million, two hundred two thousand, two hundred twenty-one".