21220716228313 has 16 divisors (see below), whose sum is σ = 24843965811840. Its totient is φ = 17745403478400.

The previous prime is 21220716228233. The next prime is 21220716228323. The reversal of 21220716228313 is 31382261702212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21220716228313 - 2⁴¹ = 19021692972761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220716228323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50192718 + ... + 50613736.

It is an arithmetic number, because the mean of its divisors is an integer number (1552747863240).

Almost surely, 2^{21220716228313} is an apocalyptic number.

It is an amenable number.

21220716228313 is a deficient number, since it is larger than the sum of its proper divisors (3623249583527).

21220716228313 is a wasteful number, since it uses less digits than its factorization.

21220716228313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596688.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 21220716228313 in words is "twenty-one trillion, two hundred twenty billion, seven hundred sixteen million, two hundred twenty-eight thousand, three hundred thirteen".