21281225010 has 16 divisors (see below), whose sum is σ = 51074940096. Its totient is φ = 5674993328.

The previous prime is 21281224997. The next prime is 21281225083. The reversal of 21281225010 is 1052218212.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 354687054 + ... + 354687113.

It is an arithmetic number, because the mean of its divisors is an integer number (3192183756).

Almost surely, 2^21281225010 is an apocalyptic number.

21281225010 is an abundant number, since it is smaller than the sum of its proper divisors (29793715086).

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

21281225010 is a wasteful number, since it uses less digits than its factorization.

21281225010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709374177.

The product of its (nonzero) digits is 640, while the sum is 24.

The spelling of 21281225010 in words is "twenty-one billion, two hundred eighty-one million, two hundred twenty-five thousand, ten".