101473779521 has 2 divisors, whose sum is σ = 101473779522. Its totient is φ = 101473779520.

The previous prime is 101473779461. The next prime is 101473779523. The reversal of 101473779521 is 125977374101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73096692496 + 28377087025 = 270364^2 + 168455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101473779521 is a prime.

Together with 101473779523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101473779523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50736889760 + 50736889761.

It is an arithmetic number, because the mean of its divisors is an integer number (50736889761).

Almost surely, 2^101473779521 is an apocalyptic number.

It is an amenable number.

101473779521 is a deficient number, since it is larger than the sum of its proper divisors (1).

101473779521 is an equidigital number, since it uses as much as digits as its factorization.

101473779521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 370440, while the sum is 47.

The spelling of 101473779521 in words is "one hundred one billion, four hundred seventy-three million, seven hundred seventy-nine thousand, five hundred twenty-one".