21242272310 has 64 divisors (see below), whose sum is σ = 46350569088. Its totient is φ = 6842548224.

The previous prime is 21242272309. The next prime is 21242272351. The reversal of 21242272310 is 1327224212.

It is a super-2 number, since 2×21242272310² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21242272310.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 671162 + ... + 702098.

It is an arithmetic number, because the mean of its divisors is an integer number (724227642).

Almost surely, 2^21242272310 is an apocalyptic number.

21242272310 is an abundant number, since it is smaller than the sum of its proper divisors (25108296778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21242272310 is a wasteful number, since it uses less digits than its factorization.

21242272310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31545.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 21242272310 its reverse (1327224212), we get a palindrome (22569496522).

The spelling of 21242272310 in words is "twenty-one billion, two hundred forty-two million, two hundred seventy-two thousand, three hundred ten".