1244164102261 has 2 divisors, whose sum is σ = 1244164102262. Its totient is φ = 1244164102260.

The previous prime is 1244164102253. The next prime is 1244164102319. The reversal of 1244164102261 is 1622014614421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1016820140625 + 227343961636 = 1008375^2 + 476806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244164102261 - 2³ = 1244164102253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244164102201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622082051130 + 622082051131.

It is an arithmetic number, because the mean of its divisors is an integer number (622082051131).

Almost surely, 2^{1244164102261} is an apocalyptic number.

It is an amenable number.

1244164102261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244164102261 is an equidigital number, since it uses as much as digits as its factorization.

1244164102261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

Adding to 1244164102261 its reverse (1622014614421), we get a palindrome (2866178716682).

The spelling of 1244164102261 in words is "one trillion, two hundred forty-four billion, one hundred sixty-four million, one hundred two thousand, two hundred sixty-one".