100021012111 has 4 divisors (see below), whose sum is σ = 104369751792. Its totient is φ = 95672272432.

The previous prime is 100021012087. The next prime is 100021012183. The reversal of 100021012111 is 111210120001.

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 100021012111 - 2²¹ = 100018914959 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 (100021012811) 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, 2174369806 + ... + 2174369851.

It is an arithmetic number, because the mean of its divisors is an integer number (26092437948).

Almost surely, 2^100021012111 is an apocalyptic number.

100021012111 is a deficient number, since it is larger than the sum of its proper divisors (4348739681).

100021012111 is an equidigital number, since it uses as much as digits as its factorization.

100021012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348739680.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 100021012111 its reverse (111210120001), we get a palindrome (211231132112).

The spelling of 100021012111 in words is "one hundred billion, twenty-one million, twelve thousand, one hundred eleven".