101580561421 has 2 divisors, whose sum is σ = 101580561422. Its totient is φ = 101580561420.

The previous prime is 101580561413. The next prime is 101580561463. The reversal of 101580561421 is 124165085101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64846622500 + 36733938921 = 254650^2 + 191661^2 .

It is a cyclic number.

It is not a de Polignac number, because 101580561421 - 2³ = 101580561413 is a prime.

It is a super-2 number, since 2×101580561421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101580565421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50790280710 + 50790280711.

It is an arithmetic number, because the mean of its divisors is an integer number (50790280711).

Almost surely, 2^101580561421 is an apocalyptic number.

It is an amenable number.

101580561421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101580561421 is an equidigital number, since it uses as much as digits as its factorization.

101580561421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 34.

The spelling of 101580561421 in words is "one hundred one billion, five hundred eighty million, five hundred sixty-one thousand, four hundred twenty-one".