1220012120111 has 4 divisors (see below), whose sum is σ = 1259367349824. Its totient is φ = 1180656890400.

The previous prime is 1220012120053. The next prime is 1220012120113. The reversal of 1220012120111 is 1110212100221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220012120111 - 2¹⁴ = 1220012103727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220012120113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19677614810 + ... + 19677614871.

It is an arithmetic number, because the mean of its divisors is an integer number (314841837456).

Almost surely, 2^{1220012120111} is an apocalyptic number.

1220012120111 is a deficient number, since it is larger than the sum of its proper divisors (39355229713).

1220012120111 is an equidigital number, since it uses as much as digits as its factorization.

1220012120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39355229712.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220012120111 its reverse (1110212100221), we get a palindrome (2330224220332).

The spelling of 1220012120111 in words is "one trillion, two hundred twenty billion, twelve million, one hundred twenty thousand, one hundred eleven".