21043212110 has 8 divisors (see below), whose sum is σ = 37877781816. Its totient is φ = 8417284840.

The previous prime is 21043212109. The next prime is 21043212137. The reversal of 21043212110 is 1121234012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052160596 + ... + 1052160615.

It is an arithmetic number, because the mean of its divisors is an integer number (4734722727).

Almost surely, 2^21043212110 is an apocalyptic number.

21043212110 is a deficient number, since it is larger than the sum of its proper divisors (16834569706).

21043212110 is a wasteful number, since it uses less digits than its factorization.

21043212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104321218.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21043212110 its reverse (1121234012), we get a palindrome (22164446122).

The spelling of 21043212110 in words is "twenty-one billion, forty-three million, two hundred twelve thousand, one hundred ten".