21224145332140 has 48 divisors (see below), whose sum is σ = 44608786498080. Its totient is φ = 8482406952960.

The previous prime is 21224145332119. The next prime is 21224145332171. The reversal of 21224145332140 is 4123354142212.

It is a junction number, because it is equal to n+sod(n) for n = 21224145332096 and 21224145332105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147501430 + ... + 147645250.

It is an arithmetic number, because the mean of its divisors is an integer number (929349718710).

Almost surely, 2^{21224145332140} is an apocalyptic number.

21224145332140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21224145332140 is an abundant number, since it is smaller than the sum of its proper divisors (23384641165940).

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

21224145332140 is a wasteful number, since it uses less digits than its factorization.

21224145332140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150082 (or 150080 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 21224145332140 its reverse (4123354142212), we get a palindrome (25347499474352).

The spelling of 21224145332140 in words is "twenty-one trillion, two hundred twenty-four billion, one hundred forty-five million, three hundred thirty-two thousand, one hundred forty".