111221020122 has 16 divisors (see below), whose sum is σ = 223396729920. Its totient is φ = 36914558432.

The previous prime is 111221020117. The next prime is 111221020171. The reversal of 111221020122 is 221020122111.

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 7 ways as a sum of consecutive naturals, for example, 39777222 + ... + 39780017.

It is an arithmetic number, because the mean of its divisors is an integer number (13962295620).

Almost surely, 2^111221020122 is an apocalyptic number.

111221020122 is an abundant number, since it is smaller than the sum of its proper divisors (112175709798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111221020122 is a wasteful number, since it uses less digits than its factorization.

111221020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79557477.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111221020122 its reverse (221020122111), we get a palindrome (332241142233).

It can be divided in two parts, 111 and 221020122, that multiplied together give a palindrome (24533233542).

The spelling of 111221020122 in words is "one hundred eleven billion, two hundred twenty-one million, twenty thousand, one hundred twenty-two".