1220221200111 has 16 divisors (see below), whose sum is σ = 1701381749760. Its totient is φ = 776424170720.

The previous prime is 1220221200089. The next prime is 1220221200199. The reversal of 1220221200111 is 1110021220221.

It is not a de Polignac number, because 1220221200111 - 2¹⁹ = 1220220675823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220221200311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19148631 + ... + 19212248.

It is an arithmetic number, because the mean of its divisors is an integer number (106336359360).

Almost surely, 2^{1220221200111} is an apocalyptic number.

1220221200111 is a deficient number, since it is larger than the sum of its proper divisors (481160549649).

1220221200111 is a wasteful number, since it uses less digits than its factorization.

1220221200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38361366.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220221200111 its reverse (1110021220221), we get a palindrome (2330242420332).

The spelling of 1220221200111 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred thousand, one hundred eleven".