21144013210 has 16 divisors (see below), whose sum is σ = 38138688000. Its totient is φ = 8439946576.

The previous prime is 21144013207. The next prime is 21144013237. The reversal of 21144013210 is 1231044112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2202310 + ... + 2211889.

It is an arithmetic number, because the mean of its divisors is an integer number (2383668000).

Almost surely, 2^21144013210 is an apocalyptic number.

21144013210 is a deficient number, since it is larger than the sum of its proper divisors (16994674790).

21144013210 is a wasteful number, since it uses less digits than its factorization.

21144013210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414685.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21144013210 its reverse (1231044112), we get a palindrome (22375057322).

The spelling of 21144013210 in words is "twenty-one billion, one hundred forty-four million, thirteen thousand, two hundred ten".