21223301313 has 32 divisors (see below), whose sum is σ = 32273620992. Its totient is φ = 12326688000.

The previous prime is 21223301311. The next prime is 21223301357. The reversal of 21223301313 is 31310332212.

It is not a de Polignac number, because 21223301313 - 2¹ = 21223301311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21223301313.

It is not an unprimeable number, because it can be changed into a prime (21223301311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255463 + ... + 328188.

It is an arithmetic number, because the mean of its divisors is an integer number (1008550656).

Almost surely, 2^21223301313 is an apocalyptic number.

21223301313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21223301313 is a deficient number, since it is larger than the sum of its proper divisors (11050319679).

21223301313 is a wasteful number, since it uses less digits than its factorization.

21223301313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583725.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21223301313 its reverse (31310332212), we get a palindrome (52533633525).

The spelling of 21223301313 in words is "twenty-one billion, two hundred twenty-three million, three hundred one thousand, three hundred thirteen".