100011211212111 has 4 divisors (see below), whose sum is σ = 133348281616152. Its totient is φ = 66674140808072.

The previous prime is 100011211212109. The next prime is 100011211212307. The reversal of 100011211212111 is 111212112110001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100011211212111 - 2¹ = 100011211212109 is a prime.

It is a super-2 number, since 2×100011211212111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100011211217111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16668535202016 + ... + 16668535202021.

It is an arithmetic number, because the mean of its divisors is an integer number (33337070404038).

Almost surely, 2^{100011211212111} is an apocalyptic number.

100011211212111 is a deficient number, since it is larger than the sum of its proper divisors (33337070404041).

100011211212111 is an equidigital number, since it uses as much as digits as its factorization.

100011211212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33337070404040.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 100011211212111 its reverse (111212112110001), we get a palindrome (211223323322112).

The spelling of 100011211212111 in words is "one hundred trillion, eleven billion, two hundred eleven million, two hundred twelve thousand, one hundred eleven".