21033122110 has 384 divisors, whose sum is σ = 55863779328. Its totient is φ = 5588352000.

The previous prime is 21033122081. The next prime is 21033122111. The reversal of 21033122110 is 1122133012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033122111) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 49959700 + ... + 49960120.

It is an arithmetic number, because the mean of its divisors is an integer number (145478592).

Almost surely, 2^21033122110 is an apocalyptic number.

21033122110 is an abundant number, since it is smaller than the sum of its proper divisors (34830657218).

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

21033122110 is a wasteful number, since it uses less digits than its factorization.

21033122110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21033122110 its reverse (1122133012), we get a palindrome (22155255122).

It can be divided in two parts, 2103 and 3122110, that added together give a palindrome (3124213).

The spelling of 21033122110 in words is "twenty-one billion, thirty-three million, one hundred twenty-two thousand, one hundred ten".