101543355054221 has 2 divisors, whose sum is σ = 101543355054222. Its totient is φ = 101543355054220.

The previous prime is 101543355054199. The next prime is 101543355054263. The reversal of 101543355054221 is 122450553345101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86447690175625 + 15095664878596 = 9297725^2 + 3885314^2 .

It is a cyclic number.

It is not a de Polignac number, because 101543355054221 - 2⁶ = 101543355054157 is a prime.

It is a super-2 number, since 2×101543355054221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101543355054521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50771677527110 + 50771677527111.

It is an arithmetic number, because the mean of its divisors is an integer number (50771677527111).

Almost surely, 2^{101543355054221} is an apocalyptic number.

It is an amenable number.

101543355054221 is a deficient number, since it is larger than the sum of its proper divisors (1).

101543355054221 is an equidigital number, since it uses as much as digits as its factorization.

101543355054221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 101543355054221 in words is "one hundred one trillion, five hundred forty-three billion, three hundred fifty-five million, fifty-four thousand, two hundred twenty-one".