21222210313 has 4 divisors (see below), whose sum is σ = 21226395460. Its totient is φ = 21218025168.

The previous prime is 21222210311. The next prime is 21222210337. The reversal of 21222210313 is 31301222212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18455765904 + 2766444409 = 135852^2 + 52597^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222210313 - 2¹ = 21222210311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222210311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2084958 + ... + 2095111.

It is an arithmetic number, because the mean of its divisors is an integer number (5306598865).

Almost surely, 2^21222210313 is an apocalyptic number.

It is an amenable number.

21222210313 is a deficient number, since it is larger than the sum of its proper divisors (4185147).

21222210313 is an equidigital number, since it uses as much as digits as its factorization.

21222210313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185146.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21222210313 its reverse (31301222212), we get a palindrome (52523432525).

The spelling of 21222210313 in words is "twenty-one billion, two hundred twenty-two million, two hundred ten thousand, three hundred thirteen".