100111212011 has 4 divisors (see below), whose sum is σ = 103563322800. Its totient is φ = 96659101224.

The previous prime is 100111212001. The next prime is 100111212017. The reversal of 100111212011 is 110212111001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110212111001 = 17 ⋅6483065353.

It is not a de Polignac number, because 100111212011 - 2¹⁰ = 100111210987 is a prime.

It is a super-2 number, since 2×100111212011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100111211983 and 100111212001.

It is not an unprimeable number, because it can be changed into a prime (100111212017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726055351 + ... + 1726055408.

It is an arithmetic number, because the mean of its divisors is an integer number (25890830700).

Almost surely, 2^100111212011 is an apocalyptic number.

100111212011 is a deficient number, since it is larger than the sum of its proper divisors (3452110789).

100111212011 is an equidigital number, since it uses as much as digits as its factorization.

100111212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452110788.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 100111212011 its reverse (110212111001), we get a palindrome (210323323012).

It can be divided in two parts, 100 and 111212011, that added together give a palindrome (111212111).

The spelling of 100111212011 in words is "one hundred billion, one hundred eleven million, two hundred twelve thousand, eleven".