21010221330149 has 2 divisors, whose sum is σ = 21010221330150. Its totient is φ = 21010221330148.

The previous prime is 21010221330089. The next prime is 21010221330169. The reversal of 21010221330149 is 94103312201012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20785301628100 + 224919702049 = 4559090^2 + 474257^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010221330149 - 2¹² = 21010221326053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010221330169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505110665074 + 10505110665075.

It is an arithmetic number, because the mean of its divisors is an integer number (10505110665075).

Almost surely, 2^{21010221330149} is an apocalyptic number.

It is an amenable number.

21010221330149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010221330149 is an equidigital number, since it uses as much as digits as its factorization.

21010221330149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 21010221330149 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, three hundred thirty thousand, one hundred forty-nine".