21202212110 has 16 divisors (see below), whose sum is σ = 38179496016. Its totient is φ = 8477437248.

The previous prime is 21202212071. The next prime is 21202212113. The reversal of 21202212110 is 1121220212.

It is a super-3 number, since 3×21202212110³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202212113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405047 + ... + 454386.

It is an arithmetic number, because the mean of its divisors is an integer number (2386218501).

Almost surely, 2^21202212110 is an apocalyptic number.

21202212110 is a deficient number, since it is larger than the sum of its proper divisors (16977283906).

21202212110 is a wasteful number, since it uses less digits than its factorization.

21202212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861907.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202212110 its reverse (1121220212), we get a palindrome (22323432322).

The spelling of 21202212110 in words is "twenty-one billion, two hundred two million, two hundred twelve thousand, one hundred ten".