21243321031402 has 32 divisors (see below), whose sum is σ = 32664235265280. Its totient is φ = 10358437636800.

The previous prime is 21243321031379. The next prime is 21243321031451. The reversal of 21243321031402 is 20413012334212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136195903 + ... + 136351789.

It is an arithmetic number, because the mean of its divisors is an integer number (1020757352040).

Almost surely, 2^{21243321031402} is an apocalyptic number.

21243321031402 is a deficient number, since it is larger than the sum of its proper divisors (11420914233878).

21243321031402 is a wasteful number, since it uses less digits than its factorization.

21243321031402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166126.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21243321031402 its reverse (20413012334212), we get a palindrome (41656333365614).

The spelling of 21243321031402 in words is "twenty-one trillion, two hundred forty-three billion, three hundred twenty-one million, thirty-one thousand, four hundred two".