2211230011261 has 2 divisors, whose sum is σ = 2211230011262. Its totient is φ = 2211230011260.

The previous prime is 2211230011169. The next prime is 2211230011267. The reversal of 2211230011261 is 1621100321122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1490887398361 + 720342612900 = 1221019^2 + 848730^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211230011261 - 2¹¹ = 2211230009213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211230011267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105615005630 + 1105615005631.

It is an arithmetic number, because the mean of its divisors is an integer number (1105615005631).

Almost surely, 2^{2211230011261} is an apocalyptic number.

It is an amenable number.

2211230011261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211230011261 is an equidigital number, since it uses as much as digits as its factorization.

2211230011261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 2211230011261 its reverse (1621100321122), we get a palindrome (3832330332383).

The spelling of 2211230011261 in words is "two trillion, two hundred eleven billion, two hundred thirty million, eleven thousand, two hundred sixty-one".