21122213310 has 96 divisors (see below), whose sum is σ = 61529581152. Its totient is φ = 4982135040.

The previous prime is 21122213297. The next prime is 21122213317. The reversal of 21122213310 is 1331222112.

21122213310 is a `hidden beast` number, since 2 + 112 + 221 + 331 + 0 = 666.

It is a super-2 number, since 2×21122213310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122213317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251689 + ... + 324948.

It is an arithmetic number, because the mean of its divisors is an integer number (640933137).

Almost surely, 2^21122213310 is an apocalyptic number.

21122213310 is an abundant number, since it is smaller than the sum of its proper divisors (40407367842).

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

21122213310 is a wasteful number, since it uses less digits than its factorization.

21122213310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576698 (or 576695 counting only the distinct ones).

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

Adding to 21122213310 its reverse (1331222112), we get a palindrome (22453435422).

It can be divided in two parts, 21122 and 213310, that added together give a palindrome (234432).

The spelling of 21122213310 in words is "twenty-one billion, one hundred twenty-two million, two hundred thirteen thousand, three hundred ten".