21110225140 has 48 divisors (see below), whose sum is σ = 45438382080. Its totient is φ = 8233483520.

The previous prime is 21110225137. The next prime is 21110225141. The reversal of 21110225140 is 4152201112.

It is a super-2 number, since 2×21110225140² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110225141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1685421 + ... + 1697899.

It is an arithmetic number, because the mean of its divisors is an integer number (946632960).

Almost surely, 2^21110225140 is an apocalyptic number.

21110225140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110225140 is an abundant number, since it is smaller than the sum of its proper divisors (24328156940).

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

21110225140 is a wasteful number, since it uses less digits than its factorization.

21110225140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14592 (or 14590 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 21110225140 its reverse (4152201112), we get a palindrome (25262426252).

The spelling of 21110225140 in words is "twenty-one billion, one hundred ten million, two hundred twenty-five thousand, one hundred forty".