1010220200261 has 2 divisors, whose sum is σ = 1010220200262. Its totient is φ = 1010220200260.

The previous prime is 1010220200257. The next prime is 1010220200267. The reversal of 1010220200261 is 1620020220101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 707726800225 + 302493400036 = 841265^2 + 549994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010220200261 - 2² = 1010220200257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010220200267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505110100130 + 505110100131.

It is an arithmetic number, because the mean of its divisors is an integer number (505110100131).

Almost surely, 2^{1010220200261} is an apocalyptic number.

It is an amenable number.

1010220200261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010220200261 is an equidigital number, since it uses as much as digits as its factorization.

1010220200261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1010220200261 its reverse (1620020220101), we get a palindrome (2630240420362).

The spelling of 1010220200261 in words is "one trillion, ten billion, two hundred twenty million, two hundred thousand, two hundred sixty-one".