111222121120101 has 40 divisors (see below), whose sum is σ = 167799310529400. Its totient is φ = 73410585897600.

The previous prime is 111222121120093. The next prime is 111222121120153. The reversal of 111222121120101 is 101021121222111.

It is a happy number.

111222121120101 is a `hidden beast` number, since 1 + 112 + 221 + 211 + 20 + 101 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4166864864100 + 107055256256001 = 2041290^2 + 10346751^2 .

It is not a de Polignac number, because 111222121120101 - 2³ = 111222121120093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222121120301) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 185482995 + ... + 186081663.

It is an arithmetic number, because the mean of its divisors is an integer number (4194982763235).

Almost surely, 2^{111222121120101} is an apocalyptic number.

It is an amenable number.

111222121120101 is a deficient number, since it is larger than the sum of its proper divisors (56577189409299).

111222121120101 is a wasteful number, since it uses less digits than its factorization.

111222121120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621491 (or 621482 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111222121120101 its reverse (101021121222111), we get a palindrome (212243242342212).

The spelling of 111222121120101 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, one hundred one".