20021210222222 has 64 divisors (see below), whose sum is σ = 35539519357440. Its totient is φ = 8355307699200.

The previous prime is 20021210222179. The next prime is 20021210222291. The reversal of 20021210222222 is 22222201212002.

It is a junction number, because it is equal to n+sod(n) for n = 20021210222194 and 20021210222203.

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 31 ways as a sum of consecutive naturals, for example, 134542823 + ... + 134691549.

It is an arithmetic number, because the mean of its divisors is an integer number (555304989960).

Almost surely, 2^{20021210222222} is an apocalyptic number.

20021210222222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021210222222 is a deficient number, since it is larger than the sum of its proper divisors (15518309135218).

20021210222222 is a wasteful number, since it uses less digits than its factorization.

20021210222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157577.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20021210222222 its reverse (22222201212002), we get a palindrome (42243411434224).

The spelling of 20021210222222 in words is "twenty trillion, twenty-one billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-two".