22155122210 has 16 divisors (see below), whose sum is σ = 42946852536. Its totient is φ = 8180352768.

The previous prime is 22155122207. The next prime is 22155122221. The reversal of 22155122210 is 1222155122.

It can be written as a sum of positive squares in 4 ways, for example, as 17506200721 + 4648921489 = 132311^2 + 68183^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85211879 + ... + 85212138.

Almost surely, 2^22155122210 is an apocalyptic number.

22155122210 is a deficient number, since it is larger than the sum of its proper divisors (20791730326).

22155122210 is a wasteful number, since it uses less digits than its factorization.

22155122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170424037.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 22155122210 its reverse (1222155122), we get a palindrome (23377277332).

The spelling of 22155122210 in words is "twenty-two billion, one hundred fifty-five million, one hundred twenty-two thousand, two hundred ten".