1101211010261 has 2 divisors, whose sum is σ = 1101211010262. Its totient is φ = 1101211010260.

The previous prime is 1101211010213. The next prime is 1101211010279. The reversal of 1101211010261 is 1620101121011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1099530502225 + 1680508036 = 1048585^2 + 40994^2 .

It is an emirp because it is prime and its reverse (1620101121011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1101211010261 - 2¹⁰ = 1101211009237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101211010461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550605505130 + 550605505131.

It is an arithmetic number, because the mean of its divisors is an integer number (550605505131).

Almost surely, 2^{1101211010261} is an apocalyptic number.

It is an amenable number.

1101211010261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101211010261 is an equidigital number, since it uses as much as digits as its factorization.

1101211010261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1101211010261 its reverse (1620101121011), we get a palindrome (2721312131272).

The spelling of 1101211010261 in words is "one trillion, one hundred one billion, two hundred eleven million, ten thousand, two hundred sixty-one".