21222101313 has 48 divisors (see below), whose sum is σ = 36506321280. Its totient is φ = 11623143168.

The previous prime is 21222101309. The next prime is 21222101323. The reversal of 21222101313 is 31310122212.

It is not a de Polignac number, because 21222101313 - 2² = 21222101309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222101323) 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 47 ways as a sum of consecutive naturals, for example, 207906 + ... + 292692.

It is an arithmetic number, because the mean of its divisors is an integer number (760548360).

Almost surely, 2^21222101313 is an apocalyptic number.

It is an amenable number.

21222101313 is a deficient number, since it is larger than the sum of its proper divisors (15284219967).

21222101313 is a wasteful number, since it uses less digits than its factorization.

21222101313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84966 (or 84963 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21222101313 its reverse (31310122212), we get a palindrome (52532223525).

The spelling of 21222101313 in words is "twenty-one billion, two hundred twenty-two million, one hundred one thousand, three hundred thirteen".