111010102122221 has 16 divisors (see below), whose sum is σ = 115971183820800. Its totient is φ = 106060301220720.

The previous prime is 111010102122149. The next prime is 111010102122239. The reversal of 111010102122221 is 122221201010111.

It is a cyclic number.

It is not a de Polignac number, because 111010102122221 - 2¹⁰ = 111010102121197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111010102122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010102122251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71403956 + ... + 72942066.

It is an arithmetic number, because the mean of its divisors is an integer number (7248198988800).

Almost surely, 2^{111010102122221} is an apocalyptic number.

It is an amenable number.

111010102122221 is a deficient number, since it is larger than the sum of its proper divisors (4961081698579).

111010102122221 is a wasteful number, since it uses less digits than its factorization.

111010102122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541776.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111010102122221 its reverse (122221201010111), we get a palindrome (233231303132332).

The spelling of 111010102122221 in words is "one hundred eleven trillion, ten billion, one hundred two million, one hundred twenty-two thousand, two hundred twenty-one".