111010020121220 has 72 divisors (see below), whose sum is σ = 259750628497752. Its totient is φ = 39814303541760.

The previous prime is 111010020121181. The next prime is 111010020121223. The reversal of 111010020121220 is 22121020010111.

It can be written as a sum of positive squares in 4 ways, for example, as 10023961252096 + 100986058869124 = 3166064^2 + 10049182^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111010020121195 and 111010020121204.

It is not an unprimeable number, because it can be changed into a prime (111010020121223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 314014499 + ... + 314367818.

Almost surely, 2^{111010020121220} is an apocalyptic number.

111010020121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111010020121220 is an abundant number, since it is smaller than the sum of its proper divisors (148740608376532).

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

111010020121220 is a wasteful number, since it uses less digits than its factorization.

111010020121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628382421 (or 628382408 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111010020121220 its reverse (22121020010111), we get a palindrome (133131040131331).

The spelling of 111010020121220 in words is "one hundred eleven trillion, ten billion, twenty million, one hundred twenty-one thousand, two hundred twenty".