21241201110 has 32 divisors (see below), whose sum is σ = 50984488800. Its totient is φ = 5663697408.

The previous prime is 21241201081. The next prime is 21241201133. The reversal of 21241201110 is 1110214212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21241201110.

It is a congruent number.

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, 281716 + ... + 349064.

It is an arithmetic number, because the mean of its divisors is an integer number (1593265275).

Almost surely, 2^21241201110 is an apocalyptic number.

21241201110 is an abundant number, since it is smaller than the sum of its proper divisors (29743287690).

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

21241201110 is a wasteful number, since it uses less digits than its factorization.

21241201110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77872.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21241201110 its reverse (1110214212), we get a palindrome (22351415322).

The spelling of 21241201110 in words is "twenty-one billion, two hundred forty-one million, two hundred one thousand, one hundred ten".