111212002232120 has 128 divisors (see below), whose sum is σ = 257860004351040. Its totient is φ = 43141127208960.

The previous prime is 111212002232117. The next prime is 111212002232143. The reversal of 111212002232120 is 21232200212111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111212002232092 and 111212002232101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405958232 + ... + 406232088.

Almost surely, 2^{111212002232120} is an apocalyptic number.

111212002232120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111212002232120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128930002175520).

111212002232120 is an abundant number, since it is smaller than the sum of its proper divisors (146648002118920).

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

111212002232120 is a wasteful number, since it uses less digits than its factorization.

111212002232120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275385 (or 275381 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 111212002232120 its reverse (21232200212111), we get a palindrome (132444202444231).

The spelling of 111212002232120 in words is "one hundred eleven trillion, two hundred twelve billion, two million, two hundred thirty-two thousand, one hundred twenty".