111222022220121 has 16 divisors (see below), whose sum is σ = 159735414804480. Its totient is φ = 68636311046160.

The previous prime is 111222022220077. The next prime is 111222022220161. The reversal of 111222022220121 is 121022220222111.

It is a de Polignac number, because none of the positive numbers 2^k-111222022220121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111222022220161) 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, 25998600531 + ... + 25998604808.

It is an arithmetic number, because the mean of its divisors is an integer number (9983463425280).

Almost surely, 2^{111222022220121} is an apocalyptic number.

It is an amenable number.

111222022220121 is a deficient number, since it is larger than the sum of its proper divisors (48513392584359).

111222022220121 is a wasteful number, since it uses less digits than its factorization.

111222022220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51997205396.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 111222022220121 its reverse (121022220222111), we get a palindrome (232244242442232).

The spelling of 111222022220121 in words is "one hundred eleven trillion, two hundred twenty-two billion, twenty-two million, two hundred twenty thousand, one hundred twenty-one".