21220021211099 has 2 divisors, whose sum is σ = 21220021211100. Its totient is φ = 21220021211098.

The previous prime is 21220021211083. The next prime is 21220021211107. The reversal of 21220021211099 is 99011212002212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220021211099 - 2⁴ = 21220021211083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21220021211009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610010605549 + 10610010605550.

It is an arithmetic number, because the mean of its divisors is an integer number (10610010605550).

Almost surely, 2^{21220021211099} is an apocalyptic number.

21220021211099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220021211099 is an equidigital number, since it uses as much as digits as its factorization.

21220021211099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 21220021211099 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, two hundred eleven thousand, ninety-nine".