1220212111222 has 16 divisors (see below), whose sum is σ = 1972240229232. Its totient is φ = 562852432800.

The previous prime is 1220212111207. The next prime is 1220212111241. The reversal of 1220212111222 is 2221112120221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220212111222.

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, 13386529 + ... + 13477372.

It is an arithmetic number, because the mean of its divisors is an integer number (123265014327).

Almost surely, 2^{1220212111222} is an apocalyptic number.

1220212111222 is a deficient number, since it is larger than the sum of its proper divisors (752028118010).

1220212111222 is a wasteful number, since it uses less digits than its factorization.

1220212111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26865663.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1220212111222 its reverse (2221112120221), we get a palindrome (3441324231443).

The spelling of 1220212111222 in words is "one trillion, two hundred twenty billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty-two".