1220221211222 has 8 divisors (see below), whose sum is σ = 1971126572016. Its totient is φ = 563179020552.

The previous prime is 1220221211203. The next prime is 1220221211327. The reversal of 1220221211222 is 2221121220221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1220221211194 and 1220221211203.

It is a congruent number.

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, 23465792498 + ... + 23465792549.

It is an arithmetic number, because the mean of its divisors is an integer number (246390821502).

Almost surely, 2^{1220221211222} is an apocalyptic number.

1220221211222 is a deficient number, since it is larger than the sum of its proper divisors (750905360794).

1220221211222 is a wasteful number, since it uses less digits than its factorization.

1220221211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46931585062.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1220221211222 its reverse (2221121220221), we get a palindrome (3441342431443).

The spelling of 1220221211222 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-two".