111221002122 has 64 divisors (see below), whose sum is σ = 234347986944. Its totient is φ = 35140921920.

The previous prime is 111221002121. The next prime is 111221002157. The reversal of 111221002122 is 221200122111.

It is a super-2 number, since 2×111221002122² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111221002121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5974513 + ... + 5993099.

It is an arithmetic number, because the mean of its divisors is an integer number (3661687296).

Almost surely, 2^111221002122 is an apocalyptic number.

111221002122 is an abundant number, since it is smaller than the sum of its proper divisors (123126984822).

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

111221002122 is a wasteful number, since it uses less digits than its factorization.

111221002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19283.

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

Adding to 111221002122 its reverse (221200122111), we get a palindrome (332421124233).

The spelling of 111221002122 in words is "one hundred eleven billion, two hundred twenty-one million, two thousand, one hundred twenty-two".