111000210122021 has 4 divisors (see below), whose sum is σ = 121091138314944. Its totient is φ = 100909281929100.

The previous prime is 111000210121979. The next prime is 111000210122057. The reversal of 111000210122021 is 120221012000111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111000210122021 - 2²⁶ = 111000143013157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111000210121987 and 111000210122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000210127021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5045464096445 + ... + 5045464096466.

It is an arithmetic number, because the mean of its divisors is an integer number (30272784578736).

Almost surely, 2^{111000210122021} is an apocalyptic number.

111000210122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111000210122021 is a deficient number, since it is larger than the sum of its proper divisors (10090928192923).

111000210122021 is a wasteful number, since it uses less digits than its factorization.

111000210122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10090928192922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111000210122021 its reverse (120221012000111), we get a palindrome (231221222122132).

The spelling of 111000210122021 in words is "one hundred eleven trillion, two hundred ten million, one hundred twenty-two thousand, twenty-one".