111220222002121 has 16 divisors (see below), whose sum is σ = 115991653859136. Its totient is φ = 106549434403776.

The previous prime is 111220222002119. The next prime is 111220222002139. The reversal of 111220222002121 is 121200222022111.

It is a cyclic number.

It is not a de Polignac number, because 111220222002121 - 2¹ = 111220222002119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111220222002151) 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, 888570 + ... + 14940883.

It is an arithmetic number, because the mean of its divisors is an integer number (7249478366196).

Almost surely, 2^{111220222002121} is an apocalyptic number.

It is an amenable number.

111220222002121 is a deficient number, since it is larger than the sum of its proper divisors (4771431857015).

111220222002121 is a wasteful number, since it uses less digits than its factorization.

111220222002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15832632.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 111220222002121 its reverse (121200222022111), we get a palindrome (232420444024232).

The spelling of 111220222002121 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred twenty-two million, two thousand, one hundred twenty-one".