21124432223207 has 2 divisors, whose sum is σ = 21124432223208. Its totient is φ = 21124432223206.

The previous prime is 21124432223177. The next prime is 21124432223231. The reversal of 21124432223207 is 70232223442112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21124432223207 - 2¹⁰ = 21124432222183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21124432223267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562216111603 + 10562216111604.

It is an arithmetic number, because the mean of its divisors is an integer number (10562216111604).

Almost surely, 2^{21124432223207} is an apocalyptic number.

21124432223207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124432223207 is an equidigital number, since it uses as much as digits as its factorization.

21124432223207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 35.

Adding to 21124432223207 its reverse (70232223442112), we get a palindrome (91356655665319).

The spelling of 21124432223207 in words is "twenty-one trillion, one hundred twenty-four billion, four hundred thirty-two million, two hundred twenty-three thousand, two hundred seven".