1220222220111 has 24 divisors (see below), whose sum is σ = 1766951550000. Its totient is φ = 811447308672.

The previous prime is 1220222220089. The next prime is 1220222220137. The reversal of 1220222220111 is 1110222220221.

It is a happy number.

1220222220111 is a `hidden beast` number, since 1 + 220 + 222 + 220 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 1220222220111 - 2¹⁴ = 1220222203727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220222220311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53721625 + ... + 53744333.

It is an arithmetic number, because the mean of its divisors is an integer number (73622981250).

Almost surely, 2^{1220222220111} is an apocalyptic number.

1220222220111 is a deficient number, since it is larger than the sum of its proper divisors (546729329889).

1220222220111 is a wasteful number, since it uses less digits than its factorization.

1220222220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37383 (or 37380 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1220222220111 its reverse (1110222220221), we get a palindrome (2330444440332).

The spelling of 1220222220111 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twenty thousand, one hundred eleven".