111002002101221 has 64 divisors (see below), whose sum is σ = 139765397571072. Its totient is φ = 85641753600000.

The previous prime is 111002002101167. The next prime is 111002002101283. The reversal of 111002002101221 is 122101200200111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111002002101221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111002002101196 and 111002002101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002002101521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3023488361 + ... + 3023525073.

It is an arithmetic number, because the mean of its divisors is an integer number (2183834337048).

Almost surely, 2^{111002002101221} is an apocalyptic number.

111002002101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111002002101221 is a deficient number, since it is larger than the sum of its proper divisors (28763395469851).

111002002101221 is a wasteful number, since it uses less digits than its factorization.

111002002101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37854.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111002002101221 its reverse (122101200200111), we get a palindrome (233103202301332).

The spelling of 111002002101221 in words is "one hundred eleven trillion, two billion, two million, one hundred one thousand, two hundred twenty-one".