1222111221220 has 48 divisors (see below), whose sum is σ = 2662669836288. Its totient is φ = 470673866880.

The previous prime is 1222111221209. The next prime is 1222111221301. The reversal of 1222111221220 is 221221112221.

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, 4880772 + ... + 5125051.

It is an arithmetic number, because the mean of its divisors is an integer number (55472288256).

Almost surely, 2^{1222111221220} is an apocalyptic number.

1222111221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222111221220 is an abundant number, since it is smaller than the sum of its proper divisors (1440558615068).

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

1222111221220 is a wasteful number, since it uses less digits than its factorization.

1222111221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006060 (or 10006058 counting only the distinct ones).

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

Adding to 1222111221220 its reverse (221221112221), we get a palindrome (1443332333441).

It can be divided in two parts, 122211 and 1221220, that added together give a palindrome (1343431).

The spelling of 1222111221220 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twenty".