111221001222 has 128 divisors (see below), whose sum is σ = 236353920000. Its totient is φ = 34852032000.

The previous prime is 111221001211. The next prime is 111221001239. The reversal of 111221001222 is 222100122111.

It is a super-2 number, since 2×111221001222² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 222887529 + ... + 222888027.

It is an arithmetic number, because the mean of its divisors is an integer number (1846515000).

Almost surely, 2^111221001222 is an apocalyptic number.

111221001222 is an abundant number, since it is smaller than the sum of its proper divisors (125132918778).

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

111221001222 is a wasteful number, since it uses less digits than its factorization.

111221001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862.

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

Adding to 111221001222 its reverse (222100122111), we get a palindrome (333321123333).

The spelling of 111221001222 in words is "one hundred eleven billion, two hundred twenty-one million, one thousand, two hundred twenty-two".