21002223329 has 2 divisors, whose sum is σ = 21002223330. Its totient is φ = 21002223328.

The previous prime is 21002223301. The next prime is 21002223353. The reversal of 21002223329 is 92332220012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19195548304 + 1806675025 = 138548^2 + 42505^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002223329 - 2¹⁶ = 21002157793 is a prime.

It is a super-2 number, since 2×21002223329² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002223298 and 21002223307.

It is not a weakly prime, because it can be changed into another prime (21002225329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501111664 + 10501111665.

It is an arithmetic number, because the mean of its divisors is an integer number (10501111665).

Almost surely, 2^21002223329 is an apocalyptic number.

It is an amenable number.

21002223329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002223329 is an equidigital number, since it uses as much as digits as its factorization.

21002223329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 21002223329 in words is "twenty-one billion, two million, two hundred twenty-three thousand, three hundred twenty-nine".