1010564111261 has 4 divisors (see below), whose sum is σ = 1010771326332. Its totient is φ = 1010356896192.

The previous prime is 1010564111213. The next prime is 1010564111287. The reversal of 1010564111261 is 1621114650101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 489433164025 + 521130947236 = 699595^2 + 721894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010564111261 is a prime.

It is a super-3 number, since 3×1010564111261³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010564111861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103600220 + ... + 103609973.

It is an arithmetic number, because the mean of its divisors is an integer number (252692831583).

Almost surely, 2^{1010564111261} is an apocalyptic number.

It is an amenable number.

1010564111261 is a deficient number, since it is larger than the sum of its proper divisors (207215071).

1010564111261 is an equidigital number, since it uses as much as digits as its factorization.

1010564111261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207215070.

The product of its (nonzero) digits is 1440, while the sum is 29.

Adding to 1010564111261 its reverse (1621114650101), we get a palindrome (2631678761362).

The spelling of 1010564111261 in words is "one trillion, ten billion, five hundred sixty-four million, one hundred eleven thousand, two hundred sixty-one".