21110210210 has 16 divisors (see below), whose sum is σ = 38002853376. Its totient is φ = 8443089648.

The previous prime is 21110210161. The next prime is 21110210237. The reversal of 21110210210 is 1201201112.

It is a super-2 number, since 2×21110210210² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21110210191 and 21110210200.

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, 31874 + ... + 207933.

It is an arithmetic number, because the mean of its divisors is an integer number (2375178336).

Almost surely, 2^21110210210 is an apocalyptic number.

21110210210 is a deficient number, since it is larger than the sum of its proper divisors (16892643166).

21110210210 is a wasteful number, since it uses less digits than its factorization.

21110210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248617.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21110210210 its reverse (1201201112), we get a palindrome (22311411322).

The spelling of 21110210210 in words is "twenty-one billion, one hundred ten million, two hundred ten thousand, two hundred ten".