111220120221 has 16 divisors (see below), whose sum is σ = 179447589504. Its totient is φ = 59815862784.

The previous prime is 111220120201. The next prime is 111220120237. The reversal of 111220120221 is 122021022111.

It is not a de Polignac number, because 111220120221 - 2⁶ = 111220120157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111220120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220120201) 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, 155770120 + ... + 155770833.

It is an arithmetic number, because the mean of its divisors is an integer number (11215474344).

Almost surely, 2^111220120221 is an apocalyptic number.

It is an amenable number.

111220120221 is a deficient number, since it is larger than the sum of its proper divisors (68227469283).

111220120221 is a wasteful number, since it uses less digits than its factorization.

111220120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311540980.

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

Adding to 111220120221 its reverse (122021022111), we get a palindrome (233241142332).

The spelling of 111220120221 in words is "one hundred eleven billion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-one".