224705130091721 has 2 divisors, whose sum is σ = 224705130091722. Its totient is φ = 224705130091720.

The previous prime is 224705130091633. The next prime is 224705130091733. The reversal of 224705130091721 is 127190031507422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223971428205625 + 733701886096 = 14965675^2 + 856564^2 .

It is a cyclic number.

It is not a de Polignac number, because 224705130091721 - 2²⁶ = 224705062982857 is a prime.

It is not a weakly prime, because it can be changed into another prime (224705130091121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112352565045860 + 112352565045861.

It is an arithmetic number, because the mean of its divisors is an integer number (112352565045861).

Almost surely, 2^{224705130091721} is an apocalyptic number.

It is an amenable number.

224705130091721 is a deficient number, since it is larger than the sum of its proper divisors (1).

224705130091721 is an equidigital number, since it uses as much as digits as its factorization.

224705130091721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 224705130091721 in words is "two hundred twenty-four trillion, seven hundred five billion, one hundred thirty million, ninety-one thousand, seven hundred twenty-one".