111212101021010 has 128 divisors (see below), whose sum is σ = 240292771430400. Its totient is φ = 36607098528000.

The previous prime is 111212101020983. The next prime is 111212101021019. The reversal of 111212101021010 is 10120101212111.

It is a super-2 number, since 2×111212101021010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111212101021019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5745521 + ... + 15982340.

It is an arithmetic number, because the mean of its divisors is an integer number (1877287276800).

Almost surely, 2^{111212101021010} is an apocalyptic number.

111212101021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212101021010 is an abundant number, since it is smaller than the sum of its proper divisors (129080670409390).

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

111212101021010 is a wasteful number, since it uses less digits than its factorization.

111212101021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21728008.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111212101021010 its reverse (10120101212111), we get a palindrome (121332202233121).

The spelling of 111212101021010 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred one million, twenty-one thousand, ten".