1220222220212 has 12 divisors (see below), whose sum is σ = 2154979609860. Its totient is φ = 604513760256.

The previous prime is 1220222220209. The next prime is 1220222220263. The reversal of 1220222220212 is 2120222220221.

It can be written as a sum of positive squares in 2 ways, for example, as 343684372516 + 876537847696 = 586246^2 + 936236^2 .

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, 1399336973 + ... + 1399337844.

It is an arithmetic number, because the mean of its divisors is an integer number (179581634155).

Almost surely, 2^{1220222220212} is an apocalyptic number.

It is an amenable number.

1220222220212 is a deficient number, since it is larger than the sum of its proper divisors (934757389648).

1220222220212 is a wasteful number, since it uses less digits than its factorization.

1220222220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798674930 (or 2798674928 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 1220222220212 its reverse (2120222220221), we get a palindrome (3340444440433).

Subtracting 1220222220212 from its reverse (2120222220221), we obtain a palindrome (900000000009).

The spelling of 1220222220212 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twelve".