1220212222222 has 16 divisors (see below), whose sum is σ = 2182739876352. Its totient is φ = 500211221400.

The previous prime is 1220212222219. The next prime is 1220212222249. The reversal of 1220212222222 is 2222222120221.

It is a junction number, because it is equal to n+sod(n) for n = 1220212222193 and 1220212222202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1894739154 + ... + 1894739797.

It is an arithmetic number, because the mean of its divisors is an integer number (136421242272).

Almost surely, 2^{1220212222222} is an apocalyptic number.

1220212222222 is a deficient number, since it is larger than the sum of its proper divisors (962527654130).

1220212222222 is a wasteful number, since it uses less digits than its factorization.

1220212222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789478983.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 1220212222222 its reverse (2222222120221), we get a palindrome (3442434342443).

The spelling of 1220212222222 in words is "one trillion, two hundred twenty billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-two".