101219271649 has 2 divisors, whose sum is σ = 101219271650. Its totient is φ = 101219271648.

The previous prime is 101219271623. The next prime is 101219271697. The reversal of 101219271649 is 946172912101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60487959249 + 40731312400 = 245943^2 + 201820^2 .

It is a cyclic number.

It is not a de Polignac number, because 101219271649 - 2¹⁵ = 101219238881 is a prime.

It is not a weakly prime, because it can be changed into another prime (101219274649) 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 as a sum of consecutive naturals, namely, 50609635824 + 50609635825.

It is an arithmetic number, because the mean of its divisors is an integer number (50609635825).

Almost surely, 2^101219271649 is an apocalyptic number.

It is an amenable number.

101219271649 is a deficient number, since it is larger than the sum of its proper divisors (1).

101219271649 is an equidigital number, since it uses as much as digits as its factorization.

101219271649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 101219271649 in words is "one hundred one billion, two hundred nineteen million, two hundred seventy-one thousand, six hundred forty-nine".