21223213122959 has 2 divisors, whose sum is σ = 21223213122960. Its totient is φ = 21223213122958.

The previous prime is 21223213122817. The next prime is 21223213122977. The reversal of 21223213122959 is 95922131232212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21223213122959 - 2³² = 21218918155663 is a prime.

It is a super-3 number, since 3×21223213122959³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223213122359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611606561479 + 10611606561480.

It is an arithmetic number, because the mean of its divisors is an integer number (10611606561480).

Almost surely, 2^{21223213122959} is an apocalyptic number.

21223213122959 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223213122959 is an equidigital number, since it uses as much as digits as its factorization.

21223213122959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The spelling of 21223213122959 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred thirteen million, one hundred twenty-two thousand, nine hundred fifty-nine".