222002001220 has 12 divisors (see below), whose sum is σ = 466204202604. Its totient is φ = 88800800480.

The previous prime is 222002001203. The next prime is 222002001251. The reversal of 222002001220 is 22100200222.

It can be written as a sum of positive squares in 2 ways, for example, as 131096133184 + 90905868036 = 362072^2 + 301506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 222002001220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5550050011 + ... + 5550050050.

It is an arithmetic number, because the mean of its divisors is an integer number (38850350217).

Almost surely, 2^222002001220 is an apocalyptic number.

222002001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222002001220 is an abundant number, since it is smaller than the sum of its proper divisors (244202201384).

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

222002001220 is a wasteful number, since it uses less digits than its factorization.

222002001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100100070 (or 11100100068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 222002001220 its reverse (22100200222), we get a palindrome (244102201442).

The spelling of 222002001220 in words is "two hundred twenty-two billion, two million, one thousand, two hundred twenty".