21211320110 has 8 divisors (see below), whose sum is σ = 38180376216. Its totient is φ = 8484528040.

The previous prime is 21211320037. The next prime is 21211320113. The reversal of 21211320110 is 1102311212.

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

It is a super-3 number, since 3×21211320110³ (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 (21211320113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060565996 + ... + 1060566015.

It is an arithmetic number, because the mean of its divisors is an integer number (4772547027).

Almost surely, 2^21211320110 is an apocalyptic number.

21211320110 is a deficient number, since it is larger than the sum of its proper divisors (16969056106).

21211320110 is a wasteful number, since it uses less digits than its factorization.

21211320110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121132018.

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

Adding to 21211320110 its reverse (1102311212), we get a palindrome (22313631322).

It can be divided in two parts, 2121 and 1320110, that added together give a palindrome (1322231).

The spelling of 21211320110 in words is "twenty-one billion, two hundred eleven million, three hundred twenty thousand, one hundred ten".