21224151340000 has 120 divisors (see below), whose sum is σ = 59673824301168. Its totient is φ = 7276851840000.

The previous prime is 21224151339971. The next prime is 21224151340019. The reversal of 21224151340000 is 4315142212.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 75660541 + ... + 75940540.

Almost surely, 2^{21224151340000} is an apocalyptic number.

21224151340000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21224151340000 is an abundant number, since it is smaller than the sum of its proper divisors (38449672961168).

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

21224151340000 is an equidigital number, since it uses as much as digits as its factorization.

21224151340000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151601118 (or 151601095 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21224151340000 its reverse (4315142212), we get a palindrome (21228466482212).

The spelling of 21224151340000 in words is "twenty-one trillion, two hundred twenty-four billion, one hundred fifty-one million, three hundred forty thousand".