1222112112220 has 24 divisors (see below), whose sum is σ = 2580614644608. Its totient is φ = 486144043200.

The previous prime is 1222112112197. The next prime is 1222112112227. The reversal of 1222112112220 is 222112112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222112112227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168796396 + ... + 168803635.

It is an arithmetic number, because the mean of its divisors is an integer number (107525610192).

Almost surely, 2^{1222112112220} is an apocalyptic number.

1222112112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222112112220 is an abundant number, since it is smaller than the sum of its proper divisors (1358502532388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222112112220 is a wasteful number, since it uses less digits than its factorization.

1222112112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337600221 (or 337600219 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1222112112220 its reverse (222112112221), we get a palindrome (1444224224441).

Subtracting from 1222112112220 its reverse (222112112221), we obtain a palindrome (999999999999).

The spelling of 1222112112220 in words is "one trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty".