1220100212222 has 16 divisors (see below), whose sum is σ = 1971326011392. Its totient is φ = 564702762360.

The previous prime is 1220100212209. The next prime is 1220100212249. The reversal of 1220100212222 is 2222120010221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220100212222.

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, 427803698 + ... + 427806549.

It is an arithmetic number, because the mean of its divisors is an integer number (123207875712).

Almost surely, 2^{1220100212222} is an apocalyptic number.

1220100212222 is a deficient number, since it is larger than the sum of its proper divisors (751225799170).

1220100212222 is a wasteful number, since it uses less digits than its factorization.

1220100212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855610303.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220100212222 its reverse (2222120010221), we get a palindrome (3442220222443).

The spelling of 1220100212222 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred twelve thousand, two hundred twenty-two".