21011221022093 has 2 divisors, whose sum is σ = 21011221022094. Its totient is φ = 21011221022092.

The previous prime is 21011221022089. The next prime is 21011221022111. The reversal of 21011221022093 is 39022012211012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11179747893769 + 9831473128324 = 3343613^2 + 3135518^2 .

It is a cyclic number.

It is not a de Polignac number, because 21011221022093 - 2² = 21011221022089 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011221022063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505610511046 + 10505610511047.

It is an arithmetic number, because the mean of its divisors is an integer number (10505610511047).

Almost surely, 2^{21011221022093} is an apocalyptic number.

It is an amenable number.

21011221022093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011221022093 is an equidigital number, since it uses as much as digits as its factorization.

21011221022093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21011221022093 in words is "twenty-one trillion, eleven billion, two hundred twenty-one million, twenty-two thousand, ninety-three".