1222120220 has 48 divisors (see below), whose sum is σ = 2604637728. Its totient is φ = 481608960.

The previous prime is 1222120213. The next prime is 1222120253. The reversal of 1222120220 is 220212221.

It is a junction number, because it is equal to n+sod(n) for n = 1222120195 and 1222120204.

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, 764462 + ... + 766058.

It is an arithmetic number, because the mean of its divisors is an integer number (54263286).

Almost surely, 2^1222120220 is an apocalyptic number.

1222120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222120220 is an abundant number, since it is smaller than the sum of its proper divisors (1382517508).

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

1222120220 is a wasteful number, since it uses less digits than its factorization.

1222120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150 (or 2148 counting only the distinct ones).

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

The square root of 1222120220 is about 34958.8360790230. The cubic root of 1222120220 is about 1069.1483659321.

Adding to 1222120220 its reverse (220212221), we get a palindrome (1442332441).

The spelling of 1222120220 in words is "one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty".