21137617230329 has 2 divisors, whose sum is σ = 21137617230330. Its totient is φ = 21137617230328.

The previous prime is 21137617230227. The next prime is 21137617230341. The reversal of 21137617230329 is 92303271673112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13686655404304 + 7450961826025 = 3699548^2 + 2729645^2 .

It is a cyclic number.

It is not a de Polignac number, because 21137617230329 - 2⁸ = 21137617230073 is a prime.

It is not a weakly prime, because it can be changed into another prime (21137617230629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10568808615164 + 10568808615165.

It is an arithmetic number, because the mean of its divisors is an integer number (10568808615165).

Almost surely, 2^{21137617230329} is an apocalyptic number.

It is an amenable number.

21137617230329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21137617230329 is an equidigital number, since it uses as much as digits as its factorization.

21137617230329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 47.

The spelling of 21137617230329 in words is "twenty-one trillion, one hundred thirty-seven billion, six hundred seventeen million, two hundred thirty thousand, three hundred twenty-nine".