1220211220222 has 4 divisors (see below), whose sum is σ = 1830316830336. Its totient is φ = 610105610110.

The previous prime is 1220211220219. The next prime is 1220211220229. The reversal of 1220211220222 is 2220221120221.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1220211220222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220211220229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305052805054 + ... + 305052805057.

It is an arithmetic number, because the mean of its divisors is an integer number (457579207584).

Almost surely, 2^{1220211220222} is an apocalyptic number.

1220211220222 is a deficient number, since it is larger than the sum of its proper divisors (610105610114).

1220211220222 is an equidigital number, since it uses as much as digits as its factorization.

1220211220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610105610113.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1220211220222 its reverse (2220221120221), we get a palindrome (3440432340443).

The spelling of 1220211220222 in words is "one trillion, two hundred twenty billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-two".