111220120121211 has 48 divisors (see below), whose sum is σ = 166739855667840. Its totient is φ = 74085116287680.

The previous prime is 111220120121183. The next prime is 111220120121213. The reversal of 111220120121211 is 112121021022111.

It is a happy number.

111220120121211 is a `hidden beast` number, since 1 + 11 + 220 + 1 + 201 + 21 + 211 = 666.

It is not a de Polignac number, because 111220120121211 - 2¹⁸ = 111220119859067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111220120121213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2011513476 + ... + 2011568766.

It is an arithmetic number, because the mean of its divisors is an integer number (3473746993080).

Almost surely, 2^{111220120121211} is an apocalyptic number.

111220120121211 is a deficient number, since it is larger than the sum of its proper divisors (55519735546629).

111220120121211 is an equidigital number, since it uses as much as digits as its factorization.

111220120121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62038 (or 62026 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111220120121211 its reverse (112121021022111), we get a palindrome (223341141143322).

The spelling of 111220120121211 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty million, one hundred twenty-one thousand, two hundred eleven".