1220011111222 has 4 divisors (see below), whose sum is σ = 1830016666836. Its totient is φ = 610005555610.

The previous prime is 1220011111153. The next prime is 1220011111237. The reversal of 1220011111222 is 2221111100221.

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

It is a super-2 number, since 2×1220011111222² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220011111196 and 1220011111205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305002777804 + ... + 305002777807.

It is an arithmetic number, because the mean of its divisors is an integer number (457504166709).

Almost surely, 2^{1220011111222} is an apocalyptic number.

1220011111222 is a deficient number, since it is larger than the sum of its proper divisors (610005555614).

1220011111222 is an equidigital number, since it uses as much as digits as its factorization.

1220011111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610005555613.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1220011111222 its reverse (2221111100221), we get a palindrome (3441122211443).

The spelling of 1220011111222 in words is "one trillion, two hundred twenty billion, eleven million, one hundred eleven thousand, two hundred twenty-two".