21224253071 has 8 divisors (see below), whose sum is σ = 24257172480. Its totient is φ = 18191554488.

The previous prime is 21224253059. The next prime is 21224253073. The reversal of 21224253071 is 17035242212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21224253071 - 2²⁶ = 21157144207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224253073) 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, 329450 + ... + 388568.

It is an arithmetic number, because the mean of its divisors is an integer number (3032146560).

Almost surely, 2^21224253071 is an apocalyptic number.

21224253071 is a deficient number, since it is larger than the sum of its proper divisors (3032919409).

21224253071 is an equidigital number, since it uses as much as digits as its factorization.

21224253071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110413.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 21224253071 its reverse (17035242212), we get a palindrome (38259495283).

The spelling of 21224253071 in words is "twenty-one billion, two hundred twenty-four million, two hundred fifty-three thousand, seventy-one".