100021110121111 has 4 divisors (see below), whose sum is σ = 101226183737112. Its totient is φ = 98816036505112.

The previous prime is 100021110121109. The next prime is 100021110121133. The reversal of 100021110121111 is 111121011120001.

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 100021110121111 - 2¹ = 100021110121109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100021110121091 and 100021110121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021110101111) 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, 602536807876 + ... + 602536808041.

It is an arithmetic number, because the mean of its divisors is an integer number (25306545934278).

Almost surely, 2^{100021110121111} is an apocalyptic number.

100021110121111 is a deficient number, since it is larger than the sum of its proper divisors (1205073616001).

100021110121111 is an equidigital number, since it uses as much as digits as its factorization.

100021110121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205073616000.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 100021110121111 its reverse (111121011120001), we get a palindrome (211142121241112).

The spelling of 100021110121111 in words is "one hundred trillion, twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred eleven".