21226222610 has 16 divisors (see below), whose sum is σ = 40454683416. Its totient is φ = 7991048448.

The previous prime is 21226222573. The next prime is 21226222621. The reversal of 21226222610 is 1622262212.

21226222610 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21100177081 + 126045529 = 145259^2 + 11227^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21226222610.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62429897 + ... + 62430236.

Almost surely, 2^21226222610 is an apocalyptic number.

21226222610 is a deficient number, since it is larger than the sum of its proper divisors (19228460806).

21226222610 is a wasteful number, since it uses less digits than its factorization.

21226222610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124860157.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21226222610 its reverse (1622262212), we get a palindrome (22848484822).

The spelling of 21226222610 in words is "twenty-one billion, two hundred twenty-six million, two hundred twenty-two thousand, six hundred ten".