100001000020111 has 4 divisors (see below), whose sum is σ = 101124606762000. Its totient is φ = 98877393278224.

The previous prime is 100001000020073. The next prime is 100001000020151. The reversal of 100001000020111 is 111020000100001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100001000020111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001000020094 and 100001000020103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001000020151) 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, 561803370811 + ... + 561803370988.

It is an arithmetic number, because the mean of its divisors is an integer number (25281151690500).

Almost surely, 2^{100001000020111} is an apocalyptic number.

100001000020111 is a deficient number, since it is larger than the sum of its proper divisors (1123606741889).

100001000020111 is an equidigital number, since it uses as much as digits as its factorization.

100001000020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123606741888.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 100001000020111 its reverse (111020000100001), we get a palindrome (211021000120112).

The spelling of 100001000020111 in words is "one hundred trillion, one billion, twenty thousand, one hundred eleven".