1222122220220 has 24 divisors (see below), whose sum is σ = 2799770905008. Its totient is φ = 444408080000.

The previous prime is 1222122220181. The next prime is 1222122220243. The reversal of 1222122220220 is 220222212221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1222122220192 and 1222122220201.

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, 2777550281 + ... + 2777550720.

It is an arithmetic number, because the mean of its divisors is an integer number (116657121042).

Almost surely, 2^{1222122220220} is an apocalyptic number.

1222122220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222122220220 is an abundant number, since it is smaller than the sum of its proper divisors (1577648684788).

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

1222122220220 is a wasteful number, since it uses less digits than its factorization.

1222122220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555101021 (or 5555101019 counting only the distinct ones).

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

Adding to 1222122220220 its reverse (220222212221), we get a palindrome (1442344432441).

It can be divided in two parts, 122212 and 2220220, that added together give a palindrome (2342432).

The spelling of 1222122220220 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty".