100111221020111 has 32 divisors (see below), whose sum is σ = 119752608368640. Its totient is φ = 81877809073536.

The previous prime is 100111221020047. The next prime is 100111221020147. The reversal of 100111221020111 is 111020122111001.

It is not a de Polignac number, because 100111221020111 - 2⁶ = 100111221020047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111221020171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5266925 + ... + 15098441.

It is an arithmetic number, because the mean of its divisors is an integer number (3742269011520).

Almost surely, 2^{100111221020111} is an apocalyptic number.

100111221020111 is a deficient number, since it is larger than the sum of its proper divisors (19641387348529).

100111221020111 is a wasteful number, since it uses less digits than its factorization.

100111221020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9832143.

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

Adding to 100111221020111 its reverse (111020122111001), we get a palindrome (211131343131112).

The spelling of 100111221020111 in words is "one hundred trillion, one hundred eleven billion, two hundred twenty-one million, twenty thousand, one hundred eleven".