21211421110 has 32 divisors (see below), whose sum is σ = 42238174464. Its totient is φ = 7604604000.

The previous prime is 21211421107. The next prime is 21211421111. The reversal of 21211421110 is 1112411212.

21211421110 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 not an unprimeable number, because it can be changed into a prime (21211421111) 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 15 ways as a sum of consecutive naturals, for example, 1350156 + ... + 1365775.

It is an arithmetic number, because the mean of its divisors is an integer number (1319942952).

Almost surely, 2^21211421110 is an apocalyptic number.

21211421110 is a deficient number, since it is larger than the sum of its proper divisors (21026753354).

21211421110 is a wasteful number, since it uses less digits than its factorization.

21211421110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716020.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211421110 its reverse (1112411212), we get a palindrome (22323832322).

The spelling of 21211421110 in words is "twenty-one billion, two hundred eleven million, four hundred twenty-one thousand, one hundred ten".