111212101010010 has 864 divisors, whose sum is σ = 379541207074176. Its totient is φ = 20754660326400.

The previous prime is 111212101009963. The next prime is 111212101010039. The reversal of 111212101010010 is 10010101212111.

It is a super-2 number, since 2×111212101010010² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 1112171115 + ... + 1112271105.

It is an arithmetic number, because the mean of its divisors is an integer number (439283804484).

Almost surely, 2^{111212101010010} is an apocalyptic number.

111212101010010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111212101010010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189770603537088).

111212101010010 is an abundant number, since it is smaller than the sum of its proper divisors (268329106064166).

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

111212101010010 is a wasteful number, since it uses less digits than its factorization.

111212101010010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100100 (or 100069 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111212101010010 its reverse (10010101212111), we get a palindrome (121222202222121).

The spelling of 111212101010010 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred one million, ten thousand, ten".