111211220121122 has 128 divisors (see below), whose sum is σ = 197523518976000. Its totient is φ = 46415488320000.

The previous prime is 111211220121101. The next prime is 111211220121137. The reversal of 111211220121122 is 221121022112111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111211220121094 and 111211220121103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1620860597 + ... + 1620929207.

It is an arithmetic number, because the mean of its divisors is an integer number (1543152492000).

Almost surely, 2^{111211220121122} is an apocalyptic number.

111211220121122 is a deficient number, since it is larger than the sum of its proper divisors (86312298854878).

111211220121122 is a wasteful number, since it uses less digits than its factorization.

111211220121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69304.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111211220121122 its reverse (221121022112111), we get a palindrome (332332242233233).

The spelling of 111211220121122 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, one hundred twenty-two".