101321613561 has 16 divisors (see below), whose sum is σ = 154428099584. Its totient is φ = 57885592464.

The previous prime is 101321613541. The next prime is 101321613641. The reversal of 101321613561 is 165316123101.

It is not a de Polignac number, because 101321613561 - 2⁵ = 101321613529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101321613541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419431 + ... + 615276.

It is an arithmetic number, because the mean of its divisors is an integer number (9651756224).

Almost surely, 2^101321613561 is an apocalyptic number.

It is an amenable number.

101321613561 is a deficient number, since it is larger than the sum of its proper divisors (53106486023).

101321613561 is a wasteful number, since it uses less digits than its factorization.

101321613561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039380.

The product of its (nonzero) digits is 3240, while the sum is 30.

Adding to 101321613561 its reverse (165316123101), we get a palindrome (266637736662).

The spelling of 101321613561 in words is "one hundred one billion, three hundred twenty-one million, six hundred thirteen thousand, five hundred sixty-one".