111122210010021 has 8 divisors (see below), whose sum is σ = 169329081920064. Its totient is φ = 63498405720000.

The previous prime is 111122210010001. The next prime is 111122210010041. The reversal of 111122210010021 is 120010012221111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111122210010001) and next prime (111122210010041).

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

It is not a de Polignac number, because 111122210010021 - 2⁷ = 111122210009893 is a prime.

It is a super-2 number, since 2×111122210010021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122210010001) 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, 2645766904980 + ... + 2645766905021.

It is an arithmetic number, because the mean of its divisors is an integer number (21166135240008).

Almost surely, 2^{111122210010021} is an apocalyptic number.

It is an amenable number.

111122210010021 is a deficient number, since it is larger than the sum of its proper divisors (58206871910043).

111122210010021 is an equidigital number, since it uses as much as digits as its factorization.

111122210010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291533810011.

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

Adding to 111122210010021 its reverse (120010012221111), we get a palindrome (231132222231132).

The spelling of 111122210010021 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred ten million, ten thousand, twenty-one".