221002121221222 has 16 divisors (see below), whose sum is σ = 370460318500944. Its totient is φ = 98005375264000.

The previous prime is 221002121221177. The next prime is 221002121221237. The reversal of 221002121221222 is 222122121200122.

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 = 221002121221193 and 221002121221202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122506718179 + ... + 122506719982.

It is an arithmetic number, because the mean of its divisors is an integer number (23153769906309).

Almost surely, 2^{221002121221222} is an apocalyptic number.

221002121221222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221002121221222 is a deficient number, since it is larger than the sum of its proper divisors (149458197279722).

221002121221222 is a wasteful number, since it uses less digits than its factorization.

221002121221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245013438215.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221002121221222 its reverse (222122121200122), we get a palindrome (443124242421344).

The spelling of 221002121221222 in words is "two hundred twenty-one trillion, two billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".