10561521031023 has 4 divisors (see below), whose sum is σ = 14082028041368. Its totient is φ = 7041014020680.

The previous prime is 10561521031021. The next prime is 10561521031037. The reversal of 10561521031023 is 32013012516501.

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

It is not a de Polignac number, because 10561521031023 - 2¹ = 10561521031021 is a prime.

It is a super-2 number, since 2×10561521031023² (a number of 27 digits) contains 22 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 (10561521031021) 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, 1760253505168 + ... + 1760253505173.

It is an arithmetic number, because the mean of its divisors is an integer number (3520507010342).

Almost surely, 2^{10561521031023} is an apocalyptic number.

10561521031023 is a deficient number, since it is larger than the sum of its proper divisors (3520507010345).

10561521031023 is an equidigital number, since it uses as much as digits as its factorization.

10561521031023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520507010344.

The product of its (nonzero) digits is 5400, while the sum is 30.

Adding to 10561521031023 its reverse (32013012516501), we get a palindrome (42574533547524).

The spelling of 10561521031023 in words is "ten trillion, five hundred sixty-one billion, five hundred twenty-one million, thirty-one thousand, twenty-three".