10012011605561 has 4 divisors (see below), whose sum is σ = 11442298977792. Its totient is φ = 8581724233332.

The previous prime is 10012011605543. The next prime is 10012011605639. The reversal of 10012011605561 is 16550611021001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10012011605561 is a prime.

It is a super-2 number, since 2×10012011605561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10012011602561) 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, 715143686105 + ... + 715143686118.

It is an arithmetic number, because the mean of its divisors is an integer number (2860574744448).

Almost surely, 2^{10012011605561} is an apocalyptic number.

It is an amenable number.

10012011605561 is a deficient number, since it is larger than the sum of its proper divisors (1430287372231).

10012011605561 is an equidigital number, since it uses as much as digits as its factorization.

10012011605561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430287372230.

The product of its (nonzero) digits is 1800, while the sum is 29.

Adding to 10012011605561 its reverse (16550611021001), we get a palindrome (26562622626562).

The spelling of 10012011605561 in words is "ten trillion, twelve billion, eleven million, six hundred five thousand, five hundred sixty-one".