21212202110 has 64 divisors (see below), whose sum is σ = 44463168000. Its totient is φ = 7204579200.

The previous prime is 21212202101. The next prime is 21212202127. The reversal of 21212202110 is 1120221212.

21212202110 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76916 + ... + 219864.

It is an arithmetic number, because the mean of its divisors is an integer number (694737000).

Almost surely, 2^21212202110 is an apocalyptic number.

21212202110 is an abundant number, since it is smaller than the sum of its proper divisors (23250965890).

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

21212202110 is a wasteful number, since it uses less digits than its factorization.

21212202110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143057.

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

Adding to 21212202110 its reverse (1120221212), we get a palindrome (22332423322).

It can be divided in two parts, 21212 and 202110, that added together give a palindrome (223322).

The spelling of 21212202110 in words is "twenty-one billion, two hundred twelve million, two hundred two thousand, one hundred ten".