21234201246 has 64 divisors (see below), whose sum is σ = 47396966400. Its totient is φ = 7046676000.

The previous prime is 21234201221. The next prime is 21234201269. The reversal of 21234201246 is 64210243212.

21234201246 is a `hidden beast` number, since 212 + 3 + 4 + 201 + 246 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 16320796 + ... + 16322096.

It is an arithmetic number, because the mean of its divisors is an integer number (740577600).

Almost surely, 2^21234201246 is an apocalyptic number.

21234201246 is an abundant number, since it is smaller than the sum of its proper divisors (26162765154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21234201246 is a wasteful number, since it uses less digits than its factorization.

21234201246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422 (or 2416 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21234201246 its reverse (64210243212), we get a palindrome (85444444458).

The spelling of 21234201246 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, two hundred forty-six".