101040140561 has 4 divisors (see below), whose sum is σ = 101604610800. Its totient is φ = 100475670324.

The previous prime is 101040140549. The next prime is 101040140581. The reversal of 101040140561 is 165041040101.

It is a happy number.

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 not a de Polignac number, because 101040140561 - 2¹⁰ = 101040139537 is a prime.

It is a super-2 number, since 2×101040140561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101040140521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282234851 + ... + 282235208.

It is an arithmetic number, because the mean of its divisors is an integer number (25401152700).

Almost surely, 2^101040140561 is an apocalyptic number.

It is an amenable number.

101040140561 is a deficient number, since it is larger than the sum of its proper divisors (564470239).

101040140561 is an equidigital number, since it uses as much as digits as its factorization.

101040140561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564470238.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 101040140561 its reverse (165041040101), we get a palindrome (266081180662).

The spelling of 101040140561 in words is "one hundred one billion, forty million, one hundred forty thousand, five hundred sixty-one".