111210202122221 has 8 divisors (see below), whose sum is σ = 117194392940544. Its totient is φ = 105321758357200.

The previous prime is 111210202122161. The next prime is 111210202122247. The reversal of 111210202122221 is 122221202012111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111210202122221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111210202122193 and 111210202122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210202122281) 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, 23936760941 + ... + 23936765586.

It is an arithmetic number, because the mean of its divisors is an integer number (14649299117568).

Almost surely, 2^{111210202122221} is an apocalyptic number.

It is an amenable number.

111210202122221 is a deficient number, since it is larger than the sum of its proper divisors (5984190818323).

111210202122221 is a wasteful number, since it uses less digits than its factorization.

111210202122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47873526651.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111210202122221 its reverse (122221202012111), we get a palindrome (233431404134332).

The spelling of 111210202122221 in words is "one hundred eleven trillion, two hundred ten billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-one".