1222000001220 has 96 divisors (see below), whose sum is σ = 3519946080000. Its totient is φ = 316529800704.

The previous prime is 1222000001219. The next prime is 1222000001267. The reversal of 1222000001220 is 221000002221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1222000001196 and 1222000001205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 870306 + ... + 1789254.

It is an arithmetic number, because the mean of its divisors is an integer number (36666105000).

Almost surely, 2^{1222000001220} is an apocalyptic number.

1222000001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222000001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1759973040000).

1222000001220 is an abundant number, since it is smaller than the sum of its proper divisors (2297946078780).

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

1222000001220 is a wasteful number, since it uses less digits than its factorization.

1222000001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919597 (or 919595 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1222000001220 its reverse (221000002221), we get a palindrome (1443000003441).

The spelling of 1222000001220 in words is "one trillion, two hundred twenty-two billion, one thousand, two hundred twenty".