20021212202222 has 16 divisors (see below), whose sum is σ = 37442266975872. Its totient is φ = 7800472286520.

The previous prime is 20021212202149. The next prime is 20021212202237. The reversal of 20021212202222 is 22220221212002.

It is a junction number, because it is equal to n+sod(n) for n = 20021212202194 and 20021212202203.

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, 65003935568 + ... + 65003935875.

It is an arithmetic number, because the mean of its divisors is an integer number (2340141685992).

Almost surely, 2^{20021212202222} is an apocalyptic number.

20021212202222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021212202222 is a deficient number, since it is larger than the sum of its proper divisors (17421054773650).

20021212202222 is a wasteful number, since it uses less digits than its factorization.

20021212202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130007871463.

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

Adding to 20021212202222 its reverse (22220221212002), we get a palindrome (42241433414224).

The spelling of 20021212202222 in words is "twenty trillion, twenty-one billion, two hundred twelve million, two hundred two thousand, two hundred twenty-two".