221100220222222 has 16 divisors (see below), whose sum is σ = 363821591433600. Its totient is φ = 99938647026040.

The previous prime is 221100220222201. The next prime is 221100220222237. The reversal of 221100220222222 is 222222022001122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 221100220222193 and 221100220222202.

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, 28072649722 + ... + 28072657597.

It is an arithmetic number, because the mean of its divisors is an integer number (22738849464600).

Almost surely, 2^{221100220222222} is an apocalyptic number.

221100220222222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221100220222222 is a deficient number, since it is larger than the sum of its proper divisors (142721371211378).

221100220222222 is a wasteful number, since it uses less digits than its factorization.

221100220222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56145307511.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 221100220222222 its reverse (222222022001122), we get a palindrome (443322242223344).

The spelling of 221100220222222 in words is "two hundred twenty-one trillion, one hundred billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty-two".