21110133340 has 24 divisors (see below), whose sum is σ = 44355970512. Its totient is φ = 8439350400.

The previous prime is 21110133337. The next prime is 21110133347. The reversal of 21110133340 is 4333101112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110133347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257014 + ... + 329053.

It is an arithmetic number, because the mean of its divisors is an integer number (1848165438).

Almost surely, 2^21110133340 is an apocalyptic number.

21110133340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110133340 is an abundant number, since it is smaller than the sum of its proper divisors (23245837172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110133340 is a wasteful number, since it uses less digits than its factorization.

21110133340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587877 (or 587875 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21110133340 its reverse (4333101112), we get a palindrome (25443234452).

The spelling of 21110133340 in words is "twenty-one billion, one hundred ten million, one hundred thirty-three thousand, three hundred forty".