21122313303 has 16 divisors (see below), whose sum is σ = 34662258176. Its totient is φ = 11141439840.

The previous prime is 21122313301. The next prime is 21122313343. The reversal of 21122313303 is 30331322112.

It is not a de Polignac number, because 21122313303 - 2¹ = 21122313301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21122313303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122313301) 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, 38685283 + ... + 38685828.

It is an arithmetic number, because the mean of its divisors is an integer number (2166391136).

Almost surely, 2^21122313303 is an apocalyptic number.

21122313303 is a deficient number, since it is larger than the sum of its proper divisors (13539944873).

21122313303 is a wasteful number, since it uses less digits than its factorization.

21122313303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77371134.

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

Adding to 21122313303 its reverse (30331322112), we get a palindrome (51453635415).

The spelling of 21122313303 in words is "twenty-one billion, one hundred twenty-two million, three hundred thirteen thousand, three hundred three".