100001220111111 has 16 divisors (see below), whose sum is σ = 145457395885440. Its totient is φ = 60606351849120.

The previous prime is 100001220111047. The next prime is 100001220111151. The reversal of 100001220111111 is 111111022100001.

It is not a de Polignac number, because 100001220111111 - 2⁶ = 100001220111047 is a prime.

It is a super-2 number, since 2×100001220111111² (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 (100001220111151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6648016 + ... + 15626853.

It is an arithmetic number, because the mean of its divisors is an integer number (9091087242840).

Almost surely, 2^{100001220111111} is an apocalyptic number.

100001220111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100001220111111 is a deficient number, since it is larger than the sum of its proper divisors (45456175774329).

100001220111111 is a wasteful number, since it uses less digits than its factorization.

100001220111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22410926.

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

Adding to 100001220111111 its reverse (111111022100001), we get a palindrome (211112242211112).

The spelling of 100001220111111 in words is "one hundred trillion, one billion, two hundred twenty million, one hundred eleven thousand, one hundred eleven".