111202212221001 has 144 divisors (see below), whose sum is σ = 182324661704640. Its totient is φ = 65220391526400.

The previous prime is 111202212220949. The next prime is 111202212221003. The reversal of 111202212221001 is 100122212202111.

111202212221001 is a `hidden beast` number, since 1 + 1 + 120 + 221 + 222 + 100 + 1 = 666.

It is not a de Polignac number, because 111202212221001 - 2⁶ = 111202212220937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111202212221003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7552951426 + ... + 7552966148.

It is an arithmetic number, because the mean of its divisors is an integer number (1266143484060).

Almost surely, 2^{111202212221001} is an apocalyptic number.

111202212221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111202212221001 is a deficient number, since it is larger than the sum of its proper divisors (71122449483639).

111202212221001 is a wasteful number, since it uses less digits than its factorization.

111202212221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16148 (or 16134 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111202212221001 its reverse (100122212202111), we get a palindrome (211324424423112).

The spelling of 111202212221001 in words is "one hundred eleven trillion, two hundred two billion, two hundred twelve million, two hundred twenty-one thousand, one".