111122021121 has 8 divisors (see below), whose sum is σ = 148177956480. Its totient is φ = 74073716592.

The previous prime is 111122021111. The next prime is 111122021141. The reversal of 111122021121 is 121120221111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111122021121 - 2⁵ = 111122021089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111122021121.

It is not an unprimeable number, because it can be changed into a prime (111122021111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1873641 + ... + 1932038.

It is an arithmetic number, because the mean of its divisors is an integer number (18522244560).

Almost surely, 2^111122021121 is an apocalyptic number.

It is an amenable number.

111122021121 is a deficient number, since it is larger than the sum of its proper divisors (37055935359).

111122021121 is an equidigital number, since it uses as much as digits as its factorization.

111122021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3815415.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111122021121 its reverse (121120221111), we get a palindrome (232242242232).

The spelling of 111122021121 in words is "one hundred eleven billion, one hundred twenty-two million, twenty-one thousand, one hundred twenty-one".