111222022021 has 4 divisors (see below), whose sum is σ = 121333114944. Its totient is φ = 101110929100.

The previous prime is 111222022013. The next prime is 111222022061. The reversal of 111222022021 is 120220222111.

It is a happy number.

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 111222022021 - 2³ = 111222022013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111222021986 and 111222022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222022061) 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, 5055546445 + ... + 5055546466.

It is an arithmetic number, because the mean of its divisors is an integer number (30333278736).

Almost surely, 2^111222022021 is an apocalyptic number.

111222022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111222022021 is a deficient number, since it is larger than the sum of its proper divisors (10111092923).

111222022021 is a wasteful number, since it uses less digits than its factorization.

111222022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111092922.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111222022021 its reverse (120220222111), we get a palindrome (231442244132).

The spelling of 111222022021 in words is "one hundred eleven billion, two hundred twenty-two million, twenty-two thousand, twenty-one".