111201012112221 has 6 divisors (see below), whose sum is σ = 160623684162110. Its totient is φ = 74134008074808.

The previous prime is 111201012112219. The next prime is 111201012112231. The reversal of 111201012112221 is 122211210102111.

It is a happy number.

111201012112221 is a `hidden beast` number, since 11 + 120 + 101 + 211 + 2 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62017987522500 + 49183024589721 = 7875150^2 + 7013061^2 .

It is not a de Polignac number, because 111201012112221 - 2¹ = 111201012112219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111201012112194 and 111201012112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201012112231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6177834006226 + ... + 6177834006243.

Almost surely, 2^{111201012112221} is an apocalyptic number.

It is an amenable number.

111201012112221 is a deficient number, since it is larger than the sum of its proper divisors (49422672049889).

111201012112221 is a wasteful number, since it uses less digits than its factorization.

111201012112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12355668012475 (or 12355668012472 counting only the distinct ones).

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

Adding to 111201012112221 its reverse (122211210102111), we get a palindrome (233412222214332).

The spelling of 111201012112221 in words is "one hundred eleven trillion, two hundred one billion, twelve million, one hundred twelve thousand, two hundred twenty-one".