20001222221222 has 32 divisors (see below), whose sum is σ = 32913485740800. Its totient is φ = 9040349213280.

The previous prime is 20001222221191. The next prime is 20001222221231. The reversal of 20001222221222 is 22212222210002.

It is a junction number, because it is equal to n+sod(n) for n = 20001222221194 and 20001222221203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5927828 + ... + 8668424.

It is an arithmetic number, because the mean of its divisors is an integer number (1028546429400).

Almost surely, 2^{20001222221222} is an apocalyptic number.

20001222221222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20001222221222 is a deficient number, since it is larger than the sum of its proper divisors (12912263519578).

20001222221222 is a wasteful number, since it uses less digits than its factorization.

20001222221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742476.

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

Adding to 20001222221222 its reverse (22212222210002), we get a palindrome (42213444431224).

The spelling of 20001222221222 in words is "twenty trillion, one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-two".