111221002202120 has 32 divisors (see below), whose sum is σ = 250255454736600. Its totient is φ = 44486943141888.

The previous prime is 111221002202117. The next prime is 111221002202129. The reversal of 111221002202120 is 21202200122111.

It can be written as a sum of positive squares in 4 ways, for example, as 32947806640324 + 78273195561796 = 5740018^2 + 8847214^2 .

It is a super-2 number, since 2×111221002202120² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111221002202129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44317919 + ... + 46760238.

Almost surely, 2^{111221002202120} is an apocalyptic number.

111221002202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221002202120 is an abundant number, since it is smaller than the sum of its proper divisors (139034452534480).

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

111221002202120 is a wasteful number, since it uses less digits than its factorization.

111221002202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91108697 (or 91108693 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111221002202120 its reverse (21202200122111), we get a palindrome (132423202324231).

The spelling of 111221002202120 in words is "one hundred eleven trillion, two hundred twenty-one billion, two million, two hundred two thousand, one hundred twenty".