21221245113313 has 8 divisors (see below), whose sum is σ = 24252910384320. Its totient is φ = 18189594548880.

The previous prime is 21221245113311. The next prime is 21221245113323. The reversal of 21221245113313 is 31331154212212.

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 21221245113313 - 2¹ = 21221245113311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221245113311) 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, 388498 + ... + 6526363.

It is an arithmetic number, because the mean of its divisors is an integer number (3031613798040).

Almost surely, 2^{21221245113313} is an apocalyptic number.

It is an amenable number.

21221245113313 is a deficient number, since it is larger than the sum of its proper divisors (3031665271007).

21221245113313 is an equidigital number, since it uses as much as digits as its factorization.

21221245113313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7353287.

The product of its digits is 8640, while the sum is 31.

Adding to 21221245113313 its reverse (31331154212212), we get a palindrome (52552399325525).

The spelling of 21221245113313 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred forty-five million, one hundred thirteen thousand, three hundred thirteen".