21220111221359 has 2 divisors, whose sum is σ = 21220111221360. Its totient is φ = 21220111221358.

The previous prime is 21220111221347. The next prime is 21220111221373. The reversal of 21220111221359 is 95312211102212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21220111221359 - 2⁸ = 21220111221103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220111221319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610055610679 + 10610055610680.

It is an arithmetic number, because the mean of its divisors is an integer number (10610055610680).

Almost surely, 2^{21220111221359} is an apocalyptic number.

21220111221359 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220111221359 is an equidigital number, since it uses as much as digits as its factorization.

21220111221359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 21220111221359 in words is "twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, three hundred fifty-nine".