111012021021220 has 48 divisors (see below), whose sum is σ = 254989473278400. Its totient is φ = 40261495720320.

The previous prime is 111012021021203. The next prime is 111012021021221. The reversal of 111012021021220 is 22120120210111.

It is a super-2 number, since 2×111012021021220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111012021021194 and 111012021021203.

It is not an unprimeable number, because it can be changed into a prime (111012021021221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 665615955 + ... + 665782714.

It is an arithmetic number, because the mean of its divisors is an integer number (5312280693300).

Almost surely, 2^{111012021021220} is an apocalyptic number.

111012021021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012021021220 is an abundant number, since it is smaller than the sum of its proper divisors (143977452257180).

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

111012021021220 is a wasteful number, since it uses less digits than its factorization.

111012021021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331399068 (or 1331399066 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111012021021220 its reverse (22120120210111), we get a palindrome (133132141231331).

The spelling of 111012021021220 in words is "one hundred eleven trillion, twelve billion, twenty-one million, twenty-one thousand, two hundred twenty".