21001002002222 has 32 divisors (see below), whose sum is σ = 34597827820800. Its totient is φ = 9481478561280.

The previous prime is 21001002002209. The next prime is 21001002002231. The reversal of 21001002002222 is 22220020010012.

It is a junction number, because it is equal to n+sod(n) for n = 21001002002197 and 21001002002206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1630688 + ... + 6682899.

It is an arithmetic number, because the mean of its divisors is an integer number (1081182119400).

Almost surely, 2^{21001002002222} is an apocalyptic number.

21001002002222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001002002222 is a deficient number, since it is larger than the sum of its proper divisors (13596825818578).

21001002002222 is a wasteful number, since it uses less digits than its factorization.

21001002002222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8314376.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21001002002222 its reverse (22220020010012), we get a palindrome (43221022012234).

The spelling of 21001002002222 in words is "twenty-one trillion, one billion, two million, two thousand, two hundred twenty-two".