100321021111 has 4 divisors (see below), whose sum is σ = 101208817872. Its totient is φ = 99433224352.

The previous prime is 100321021067. The next prime is 100321021139. The reversal of 100321021111 is 111120123001.

It is a happy number.

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 100321021111 - 2¹¹ = 100321019063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100321021091 and 100321021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100321027111) 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, 443898211 + ... + 443898436.

It is an arithmetic number, because the mean of its divisors is an integer number (25302204468).

Almost surely, 2^100321021111 is an apocalyptic number.

100321021111 is a deficient number, since it is larger than the sum of its proper divisors (887796761).

100321021111 is an equidigital number, since it uses as much as digits as its factorization.

100321021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887796760.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 100321021111 its reverse (111120123001), we get a palindrome (211441144112).

The spelling of 100321021111 in words is "one hundred billion, three hundred twenty-one million, twenty-one thousand, one hundred eleven".