2201210131261 has 2 divisors, whose sum is σ = 2201210131262. Its totient is φ = 2201210131260.

The previous prime is 2201210131189. The next prime is 2201210131331. The reversal of 2201210131261 is 1621310121022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2158016822361 + 43193308900 = 1469019^2 + 207830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201210131261 - 2³⁵ = 2166850392893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2201210131661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100605065630 + 1100605065631.

It is an arithmetic number, because the mean of its divisors is an integer number (1100605065631).

Almost surely, 2^{2201210131261} is an apocalyptic number.

It is an amenable number.

2201210131261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201210131261 is an equidigital number, since it uses as much as digits as its factorization.

2201210131261 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2201210131261 its reverse (1621310121022), we get a palindrome (3822520252283).

The spelling of 2201210131261 in words is "two trillion, two hundred one billion, two hundred ten million, one hundred thirty-one thousand, two hundred sixty-one".