21210231110 has 16 divisors (see below), whose sum is σ = 39109597632. Its totient is φ = 8277163200.

The previous prime is 21210231089. The next prime is 21210231121. The reversal of 21210231110 is 1113201212.

It is a super-2 number, since 2×21210231110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25865726 + ... + 25866545.

It is an arithmetic number, because the mean of its divisors is an integer number (2444349852).

Almost surely, 2^21210231110 is an apocalyptic number.

21210231110 is a deficient number, since it is larger than the sum of its proper divisors (17899366522).

21210231110 is a wasteful number, since it uses less digits than its factorization.

21210231110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51732319.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21210231110 its reverse (1113201212), we get a palindrome (22323432322).

The spelling of 21210231110 in words is "twenty-one billion, two hundred ten million, two hundred thirty-one thousand, one hundred ten".