1022261257263 has 16 divisors (see below), whose sum is σ = 1369693898496. Its totient is φ = 678173016000.

The previous prime is 1022261257247. The next prime is 1022261257309. The reversal of 1022261257263 is 3627521622201.

It is not a de Polignac number, because 1022261257263 - 2⁴ = 1022261257247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022261257223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207270 + ... + 1444812.

It is an arithmetic number, because the mean of its divisors is an integer number (85605868656).

Almost surely, 2^{1022261257263} is an apocalyptic number.

1022261257263 is a deficient number, since it is larger than the sum of its proper divisors (347432641233).

1022261257263 is a wasteful number, since it uses less digits than its factorization.

1022261257263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238894.

The product of its (nonzero) digits is 120960, while the sum is 39.

Adding to 1022261257263 its reverse (3627521622201), we get a palindrome (4649782879464).

The spelling of 1022261257263 in words is "one trillion, twenty-two billion, two hundred sixty-one million, two hundred fifty-seven thousand, two hundred sixty-three".