21033301144 has 16 divisors (see below), whose sum is σ = 39439033920. Its totient is φ = 10516225440.

The previous prime is 21033301141. The next prime is 21033301189. The reversal of 21033301144 is 44110333012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033301141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279897 + ... + 346999.

It is an arithmetic number, because the mean of its divisors is an integer number (2464939620).

Almost surely, 2^21033301144 is an apocalyptic number.

It is an amenable number.

21033301144 is a deficient number, since it is larger than the sum of its proper divisors (18405732776).

21033301144 is a wasteful number, since it uses less digits than its factorization.

21033301144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106290 (or 106286 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21033301144 its reverse (44110333012), we get a palindrome (65143634156).

The spelling of 21033301144 in words is "twenty-one billion, thirty-three million, three hundred one thousand, one hundred forty-four".