21222012302 has 16 divisors (see below), whose sum is σ = 32867500032. Its totient is φ = 10266337560.

The previous prime is 21222012289. The next prime is 21222012313. The reversal of 21222012302 is 20321022212.

It is a super-2 number, since 2×21222012302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246803 + ... + 321489.

It is an arithmetic number, because the mean of its divisors is an integer number (2054218752).

Almost surely, 2^21222012302 is an apocalyptic number.

21222012302 is a deficient number, since it is larger than the sum of its proper divisors (11645487730).

21222012302 is a wasteful number, since it uses less digits than its factorization.

21222012302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79303.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21222012302 its reverse (20321022212), we get a palindrome (41543034514).

The spelling of 21222012302 in words is "twenty-one billion, two hundred twenty-two million, twelve thousand, three hundred two".