2099703518221 has 2 divisors, whose sum is σ = 2099703518222. Its totient is φ = 2099703518220.

The previous prime is 2099703518179. The next prime is 2099703518233. The reversal of 2099703518221 is 1228153079902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1704708866025 + 394994652196 = 1305645^2 + 628486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2099703518221 - 2¹¹ = 2099703516173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2099703510221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049851759110 + 1049851759111.

It is an arithmetic number, because the mean of its divisors is an integer number (1049851759111).

Almost surely, 2^{2099703518221} is an apocalyptic number.

It is an amenable number.

2099703518221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2099703518221 is an equidigital number, since it uses as much as digits as its factorization.

2099703518221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

It can be divided in two parts, 2099703 and 518221, that added together give a square (2617924 = 1618²).

The spelling of 2099703518221 in words is "two trillion, ninety-nine billion, seven hundred three million, five hundred eighteen thousand, two hundred twenty-one".