21144213310 has 16 divisors (see below), whose sum is σ = 41519546352. Its totient is φ = 7688804800.

The previous prime is 21144213271. The next prime is 21144213319. The reversal of 21144213310 is 1331244112.

It is a super-2 number, since 2×21144213310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144213319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96109951 + ... + 96110170.

It is an arithmetic number, because the mean of its divisors is an integer number (2594971647).

Almost surely, 2^21144213310 is an apocalyptic number.

21144213310 is a deficient number, since it is larger than the sum of its proper divisors (20375333042).

21144213310 is a wasteful number, since it uses less digits than its factorization.

21144213310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192220139.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21144213310 its reverse (1331244112), we get a palindrome (22475457422).

The spelling of 21144213310 in words is "twenty-one billion, one hundred forty-four million, two hundred thirteen thousand, three hundred ten".