111220211121321 has 16 divisors (see below), whose sum is σ = 148668260695488. Its totient is φ = 73959487272000.

The previous prime is 111220211121301. The next prime is 111220211121347. The reversal of 111220211121321 is 123121112022111.

It is not a de Polignac number, because 111220211121321 - 2¹³ = 111220211113129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111220211121301) 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, 214992271 + ... + 215508971.

It is an arithmetic number, because the mean of its divisors is an integer number (9291766293468).

Almost surely, 2^{111220211121321} is an apocalyptic number.

It is an amenable number.

111220211121321 is a deficient number, since it is larger than the sum of its proper divisors (37448049574167).

111220211121321 is a wasteful number, since it uses less digits than its factorization.

111220211121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697832.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 111220211121321 its reverse (123121112022111), we get a palindrome (234341323143432).

The spelling of 111220211121321 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred eleven million, one hundred twenty-one thousand, three hundred twenty-one".