111221011210 has 8 divisors (see below), whose sum is σ = 200197820196. Its totient is φ = 44488404480.

The previous prime is 111221011183. The next prime is 111221011241. The reversal of 111221011210 is 12110122111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 110152963449 + 1068047761 = 331893^2 + 32681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×111221011210² (a number of 23 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 5561050551 + ... + 5561050570.

Almost surely, 2^111221011210 is an apocalyptic number.

111221011210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221011210 is a deficient number, since it is larger than the sum of its proper divisors (88976808986).

111221011210 is a wasteful number, since it uses less digits than its factorization.

111221011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11122101128.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111221011210 its reverse (12110122111), we get a palindrome (123331133321).

The spelling of 111221011210 in words is "one hundred eleven billion, two hundred twenty-one million, eleven thousand, two hundred ten".