21670020172222 has 16 divisors (see below), whose sum is σ = 32643193892400. Its totient is φ = 10788978456000.

The previous prime is 21670020172219. The next prime is 21670020172237. The reversal of 21670020172222 is 22227102007612.

It is a congruent number.

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, 3834597 + ... + 7618672.

It is an arithmetic number, because the mean of its divisors is an integer number (2040199618275).

Almost surely, 2^{21670020172222} is an apocalyptic number.

21670020172222 is a deficient number, since it is larger than the sum of its proper divisors (10973173720178).

21670020172222 is a wasteful number, since it uses less digits than its factorization.

21670020172222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11457291.

The product of its (nonzero) digits is 18816, while the sum is 34.

Adding to 21670020172222 its reverse (22227102007612), we get a palindrome (43897122179834).

The spelling of 21670020172222 in words is "twenty-one trillion, six hundred seventy billion, twenty million, one hundred seventy-two thousand, two hundred twenty-two".