21733207300421 has 2 divisors, whose sum is σ = 21733207300422. Its totient is φ = 21733207300420.

The previous prime is 21733207300313. The next prime is 21733207300423. The reversal of 21733207300421 is 12400370233712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17183885169025 + 4549322131396 = 4145345^2 + 2132914^2 .

It is a cyclic number.

It is not a de Polignac number, because 21733207300421 - 2³⁸ = 21458329393477 is a prime.

Together with 21733207300423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21733207300423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10866603650210 + 10866603650211.

It is an arithmetic number, because the mean of its divisors is an integer number (10866603650211).

Almost surely, 2^{21733207300421} is an apocalyptic number.

It is an amenable number.

21733207300421 is a deficient number, since it is larger than the sum of its proper divisors (1).

21733207300421 is an equidigital number, since it uses as much as digits as its factorization.

21733207300421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 21733207300421 in words is "twenty-one trillion, seven hundred thirty-three billion, two hundred seven million, three hundred thousand, four hundred twenty-one".