21101222322 has 24 divisors (see below), whose sum is σ = 46954973676. Its totient is φ = 6843639456.

The previous prime is 21101222291. The next prime is 21101222357. The reversal of 21101222322 is 22322210112.

21101222322 is a `hidden beast` number, since 21 + 101 + 222 + 322 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21016010961 + 85211361 = 144969^2 + 9231^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21101222295 and 21101222304.

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 11 ways as a sum of consecutive naturals, for example, 15841093 + ... + 15842424.

Almost surely, 2^21101222322 is an apocalyptic number.

21101222322 is an abundant number, since it is smaller than the sum of its proper divisors (25853751354).

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

21101222322 is a wasteful number, since it uses less digits than its factorization.

21101222322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31683562 (or 31683559 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21101222322 its reverse (22322210112), we get a palindrome (43423432434).

The spelling of 21101222322 in words is "twenty-one billion, one hundred one million, two hundred twenty-two thousand, three hundred twenty-two".