21342231207 has 24 divisors (see below), whose sum is σ = 33799209600. Its totient is φ = 12869675280.

The previous prime is 21342231191. The next prime is 21342231217. The reversal of 21342231207 is 70213224312.

21342231207 is a `hidden beast` number, since 2 + 1 + 3 + 422 + 31 + 207 = 666.

It is not a de Polignac number, because 21342231207 - 2⁴ = 21342231191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342231217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 521953 + ... + 561354.

It is an arithmetic number, because the mean of its divisors is an integer number (1408300400).

Almost surely, 2^21342231207 is an apocalyptic number.

21342231207 is a deficient number, since it is larger than the sum of its proper divisors (12456978393).

21342231207 is a wasteful number, since it uses less digits than its factorization.

21342231207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083523 (or 1083520 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

Adding to 21342231207 its reverse (70213224312), we get a palindrome (91555455519).

The spelling of 21342231207 in words is "twenty-one billion, three hundred forty-two million, two hundred thirty-one thousand, two hundred seven".