21223210132109 has 2 divisors, whose sum is σ = 21223210132110. Its totient is φ = 21223210132108.

The previous prime is 21223210132097. The next prime is 21223210132127. The reversal of 21223210132109 is 90123101232212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16956713329609 + 4266496802500 = 4117853^2 + 2065550^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223210132109 - 2⁴ = 21223210132093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223210132169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611605066054 + 10611605066055.

It is an arithmetic number, because the mean of its divisors is an integer number (10611605066055).

Almost surely, 2^{21223210132109} is an apocalyptic number.

It is an amenable number.

21223210132109 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223210132109 is an equidigital number, since it uses as much as digits as its factorization.

21223210132109 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 29.

The spelling of 21223210132109 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred ten million, one hundred thirty-two thousand, one hundred nine".